Head-to-head comparison

Claude Sonnet 4.6 vs. Kimi K2.6

Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.

shared result series: 178
distinct benchmarks: 22
latest retrieval: 2026-10-15

First modelSecond model

Specifications

General specifications

Release date, availability, context window, architecture, and published parameter counts at a glance. Undisclosed details remain marked as unavailable.

Specifications for Claude Sonnet 4.6 and Kimi K2.6
Attribute	Claude Sonnet 4.6	Kimi K2.6
Provider	Anthropic	Moonshot AI
Released	Feb 2026	Apr 20, 2026
Availability	Active	Active
Model type	Proprietary	Open Weights
Parameters	Not published	1T, 32B active
Architecture	Not published	Mixture of Experts
Context window	1,000,000 tokens	262,144 tokens
Knowledge cutoff	August 2025	Not published
Technical sources	Model, Context	Model, Context

Pricing

API pricing compared

The table compares official standard API rates per 1M tokens, including published cache pricing. Batch, fast, priority, regional surcharges, tool calls, and cloud platform pricing are excluded.

API pricing for Claude Sonnet 4.6 and Kimi K2.6
Price type	Claude Sonnet 4.6	Kimi K2.6
API input	$3	$0.95
API output	$15	$4
Cache read	$0.3	$0.16
Cache write (5 min.)	$3.75	Not listed
Cache write (1 hr.)	$6	Not listed
Price verified	09/22/2026 Source	09/22/2026 Source

Claude Sonnet 4.6Kimi K2.6

API inputUSD per 1M tokens, base tier

Claude Sonnet 4.6$3

Kimi K2.6$0.95

API outputUSD per 1M tokens, base tier

Claude Sonnet 4.6$15

Kimi K2.6$4

Cache readUSD per 1M tokens, base tier

Claude Sonnet 4.6$0.3

Kimi K2.6$0.16

Key to the marks:better valuebetter, but not conclusivetie

Pricing by provider

Direct developer pricing and provider endpoint tariffs routed through OpenRouter are listed separately. Prices are in USD per 1M tokens. Context-dependent direct tiers plus regional, Flex, Priority, and other OpenRouter tariffs remain individually identifiable.

Provider pricing for Claude Sonnet 4.6 and Kimi K2.6
Model	Provider	Purchase route and tariff	Input per 1M tokens	Output per 1M tokens	Source
Claude Sonnet 4.6	Anthropic	Direct from developerStandard API	Lowest listed price: $3	Lowest listed price: $15	Source09/22/2026
	Amazon Bedrock	Via OpenRouteramazon-bedrock/eu-west-1	$3.3	$16.5	Source10/17/2026
	Amazon Bedrock	Via OpenRouteramazon-bedrock/global	Lowest listed price: $3	Lowest listed price: $15	Source10/17/2026
	Amazon Bedrock	Via OpenRouteramazon-bedrock/us	$3.3	$16.5	Source10/17/2026
	Anthropic	Via OpenRouteranthropic	Lowest listed price: $3	Lowest listed price: $15	Source10/17/2026
	Azure	Via OpenRouterazure/global	Lowest listed price: $3	Lowest listed price: $15	Source10/17/2026
	Claude Platform on AWS	Via OpenRouterclaude-on-aws	Lowest listed price: $3	Lowest listed price: $15	Source10/17/2026
	Google	Via OpenRoutergoogle-vertex/europe	$3.3	$16.5	Source10/17/2026
	Google	Via OpenRoutergoogle-vertex/global	Lowest listed price: $3	Lowest listed price: $15	Source10/17/2026
	Google	Via OpenRoutergoogle-vertex/us-east5	$3.3	$16.5	Source10/17/2026
Kimi K2.6	Moonshot AI	Direct from developerStandard API	$0.95	$4	Source09/22/2026
	AtlasCloud	Via OpenRouteratlas-cloud/int4	$0.95	$4	Source10/17/2026
	Baidu	Via OpenRouterbaidu/fp4	Lowest listed price: $0.4323	Lowest listed price: $1.82	Source10/17/2026
	Chutes	Via OpenRouterchutes/int4	$0.45	$1.95	Source10/17/2026
	Cloudflare	Via OpenRoutercloudflare	$0.95	$4	Source10/17/2026
	CoreWeave	Via OpenRoutercoreweave/fp4	$0.65	$3.41	Source10/17/2026
	Crusoe	Via OpenRoutercrusoe/bf16	$0.7	$3.5	Source10/17/2026
	DeepInfra	Via OpenRouterdeepinfra/fp4	$0.75	$3.5	Source10/17/2026
	DigitalOcean	Via OpenRouterdigitalocean	$0.57	$2.4	Source10/17/2026
	GMICloud	Via OpenRoutergmicloud/fp8	$0.855	$3.6	Source10/17/2026
	Inceptron	Via OpenRouterinceptron/int4	$0.4323	$3.2	Source10/17/2026
	Moonshot AI	Via OpenRoutermoonshotai/int4	$0.95	$4	Source10/17/2026
	Novita	Via OpenRouternovita	$0.8	$3.4	Source10/17/2026
	Parasail	Via OpenRouterparasail/int4	$0.75	$3.5	Source10/17/2026
	Phala	Via OpenRouterphala	$1.09	$4.6	Source10/17/2026
	SiliconFlow	Via OpenRoutersiliconflow/fp8	$0.77	$3.4	Source10/17/2026
	StreamLake	Via OpenRouterstreamlake/fp8	$0.5985	$2.52	Source10/17/2026
	Venice	Via OpenRoutervenice/int4	$0.75	$3.5	Source10/17/2026

Performance

Shared benchmarks

Only published results with the same benchmark version, task, metric, and comparison cohort are paired. Different reasoning levels, agents, harnesses, or output limits appear directly in the table.

Capability profile from matched benchmarks

Each axis averages directly matched benchmark families. A value of 100 means the stronger value within this pair, not a universal quality score.

Not enough directly matched categories for a reliable radar

Only 1 of at least 5 categories have comparable, direct model measurements. The benchmark tables below show the available evidence without filling missing axes.

Claude Sonnet 4.6Kimi K2.6

Code MigrationOverall. Higher is better. Test setup not documented as identical

Claude Sonnet 4.639.892 %

Kimi K2.627.768 %

CorpFin v2Overall. Higher is better. Test setup not documented as identical

Claude Sonnet 4.665.307 %

Kimi K2.666.744 %

EMBOverall. Higher is better. Test setup not documented as identical

Claude Sonnet 4.660.154 %

Kimi K2.657.855 %

Finance Agent (v2)Overall. Higher is better. Test setup not documented as identical

Claude Sonnet 4.651.035 %

Kimi K2.644.899 %

GPQA DiamondOverall. Higher is better. Test setup not documented as identical

Claude Sonnet 4.685.606 %

Kimi K2.689.142 %

Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. Test setup not documented as identical

Claude Sonnet 4.65 %

Kimi K2.61.667 %

Legal Research BenchOverall · All-pass. Higher is better. Test setup not documented as identical

Claude Sonnet 4.638.462 %

Kimi K2.615.865 %

LegalBenchOverall. Higher is better. Test setup not documented as identical

Claude Sonnet 4.682.12 %

Kimi K2.684.738 %

LiveCodeBench v6Overall. Higher is better. Test setup not documented as identical

Claude Sonnet 4.682.091 %

Kimi K2.686.771 %

MMLU-ProOverall. Higher is better. Test setup not documented as identical

Claude Sonnet 4.687.341 %

Kimi K2.687.572 %

MMMU-ProOverall. Higher is better. Test setup not documented as identical

Claude Sonnet 4.683.584 %

Kimi K2.686.301 %

MortgageTaxOverall. Higher is better. Test setup not documented as identical

Claude Sonnet 4.667.726 %

Kimi K2.665.818 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for Claude Sonnet 4.6 and Kimi K2.6
Benchmark and task	Claude Sonnet 4.6	Kimi K2.6	Source
Code MigrationOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value39.892 %	27.768 %	Vals AI Source details Data as of: 10/12/2026
CorpFin v2Overall Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 48,000 tokens	65.307 %	Higher measured value66.744 %	Vals AI Source details Data as of: 08/12/2026
EMBOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value60.154 %	57.855 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)Overall Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value51.035 %	44.899 %	Vals AI Source details Data as of: 10/12/2026
GPQA DiamondOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	85.606 %	Higher measured value89.142 %	Vals AI Source details Data as of: 09/01/2026
Harvey's Legal Agent BenchmarkOverall · Task fully resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value5 %	1.667 %	Vals AI Source details Data as of: 10/12/2026
Legal Research BenchOverall · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value38.462 %	15.865 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	82.12 %	Higher measured value84.738 %	Vals AI Source details Data as of: 10/13/2026
LiveCodeBench v6Overall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	82.091 %	Higher measured value86.771 %	Vals AI Source details Data as of: 09/01/2026
MMLU-ProOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	87.341 %	Higher measured value87.572 %	Vals AI Source details Data as of: 09/01/2026
MMMU-ProOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	83.584 %	Higher measured value86.301 %	Vals AI Source details Data as of: 09/01/2026
MortgageTaxOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value67.726 %	65.818 %	Vals AI Source details Data as of: 09/01/2026
ProgramBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: fully resolved rateScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value0.5 %	0 %	Vals AI Source details Data as of: 10/12/2026
Public Benefits Bench v1.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value62.449 %	56.631 %	Vals AI Source details Data as of: 10/12/2026
SAGEOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 30,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 30,000 tokens	46.582 %	Higher measured value50.224 %	Vals AI Source details Data as of: 10/08/2026
SWE-bench VerifiedOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value77.4 %	76.2 %	Vals AI Source details Data as of: 09/01/2026
Tax Agent BenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value25.84 %	12.404 %	Vals AI Source details Data as of: 10/12/2026
TaxEval v2Overall Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value77.106 %	74.652 %	Vals AI Source details Data as of: 09/01/2026
Terminal-Bench 2.0Overall Test details Test setup not documented as identicalNo direct winnerVersion: 2.0Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 256,000 tokens	Higher measured value59.551 %	57.303 %	Vals AI Source details Data as of: 06/04/2026
Terminal-Bench 2.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 256,000 tokens	Higher measured value57.303 %	53.558 %	Vals AI Source details Data as of: 09/28/2026
Vals Multimodal IndexOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1.2Metric: weighted index scoreScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value60.571 %	56.434 %	Vals AI Source details Data as of: 08/11/2026
Vibe Code Bench v1.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Harness: OpenHands, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Harness: OpenHands, Top P: 0.95, Output limit: 128,000 tokens	Higher measured value51.476 %	37.891 %	Vals AI Source details Data as of: 10/12/2026
Code MigrationCLI Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value30.333 %	17.977 %	Vals AI Source details Data as of: 10/12/2026
CorpFin v2Exact Pages Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 48,000 tokens	63.17 %	Higher measured value64.802 %	Vals AI Source details Data as of: 08/12/2026
EMBComps Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value61.52 %	61.395 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)Adjustments Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value48.92 %	37.934 %	Vals AI Source details Data as of: 10/12/2026
GPQA DiamondFew-Shot CoT Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	85.859 %	Higher measured value89.899 %	Vals AI Source details Data as of: 09/01/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Criteria passed Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value87.319 %	63.768 %	Vals AI Source details Data as of: 10/12/2026
Legal Research BenchAdministrative / Regulatory · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value43.939 %	18.182 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchConclusion Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	87.991 %	Higher measured value89.413 %	Vals AI Source details Data as of: 10/13/2026
LiveCodeBench v6Easy Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	98.758 %	Higher measured value99.068 %	Vals AI Source details Data as of: 09/01/2026
MMLU-ProBiology Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	92.748 %	Higher measured value93.724 %	Vals AI Source details Data as of: 09/01/2026
MortgageTaxNumerical Extraction Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value74.96 %	74.483 %	Vals AI Source details Data as of: 09/01/2026
ProgramBenchAlmost Resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: almost-resolved rateScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value2 %	0.5 %	Vals AI Source details Data as of: 10/12/2026
SAGEAutomata Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 30,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 30,000 tokens	35.318 %	Higher measured value42.857 %	Vals AI Source details Data as of: 10/08/2026
SWE-bench Verified<15 min fix Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	87.113 %	Higher measured value87.629 %	Vals AI Source details Data as of: 09/01/2026
Tax Agent BenchControversy & Precedence Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value10 %	3.333 %	Vals AI Source details Data as of: 10/12/2026
TaxEval v2Correctness Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value65.822 %	62.715 %	Vals AI Source details Data as of: 09/01/2026
Terminal-Bench 2.0Easy Test details Test setup not documented as identicalNo direct winnerVersion: 2.0Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 256,000 tokens	No direct winner75 %	No direct winner75 %	Vals AI Source details Data as of: 06/04/2026
Terminal-Bench 2.1Easy Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 256,000 tokens	Higher measured value100 %	83.333 %	Vals AI Source details Data as of: 09/28/2026
Vals Multimodal IndexCorpFin v2 Test details Test setup not documented as identicalNo direct winnerVersion: 1.2Metric: benchmark scoreScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	66.667 %	Higher measured value68.182 %	Vals AI Source details Data as of: 08/11/2026
Code MigrationCOBOL Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value68.571 %	57.143 %	Vals AI Source details Data as of: 10/12/2026
CorpFin v2Max Fitting Context Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 48,000 tokens	66.084 %	Higher measured value67.249 %	Vals AI Source details Data as of: 08/12/2026
EMBDataroom Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value78.493 %	75.069 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)All-Pass Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value38.795 %	32.584 %	Vals AI Source details Data as of: 10/12/2026
GPQA DiamondZero-Shot CoT Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	85.354 %	Higher measured value88.384 %	Vals AI Source details Data as of: 09/01/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Task fully resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	No direct winner0 %	No direct winner0 %	Vals AI Source details Data as of: 10/12/2026
Legal Research BenchAdministrative / Regulatory · Weighted partial credit Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: weighted partial-credit scoreScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value86.797 %	75.531 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchInterpretation Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value82.469 %	82.197 %	Vals AI Source details Data as of: 10/13/2026
LiveCodeBench v6Hard Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	60.571 %	Higher measured value71.429 %	Vals AI Source details Data as of: 09/01/2026
MMLU-ProBusiness Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value91.888 %	91.635 %	Vals AI Source details Data as of: 09/01/2026
MortgageTaxSemantic Extraction Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value60.493 %	57.154 %	Vals AI Source details Data as of: 09/01/2026
ProgramBenchFully Resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: fully resolved rateScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value0.5 %	0 %	Vals AI Source details Data as of: 10/12/2026
SAGECalculus Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Temperature: 1, Output limit: 30,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 30,000 tokens	Higher measured value60.494 %	22.839 %	Vals AI Source details Data as of: 10/08/2026
SWE-bench Verified>4 hours Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value33.333 %	0 %	Vals AI Source details Data as of: 09/01/2026
Tax Agent BenchControversy & Precedence Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value57.949 %	42.296 %	Vals AI Source details Data as of: 10/12/2026
TaxEval v2Stepwise Reasoning Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value88.389 %	86.59 %	Vals AI Source details Data as of: 09/01/2026
Terminal-Bench 2.0Hard Test details Test setup not documented as identicalNo direct winnerVersion: 2.0Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 256,000 tokens	Higher measured value40 %	36.667 %	Vals AI Source details Data as of: 06/04/2026
Terminal-Bench 2.1Hard Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 256,000 tokens	Higher measured value34.444 %	25.556 %	Vals AI Source details Data as of: 09/28/2026
Vals Multimodal IndexFinance Agent v2 Test details Test setup not documented as identicalNo direct winnerVersion: 1.2Metric: benchmark scoreScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value51.033 %	44.932 %	Vals AI Source details Data as of: 08/11/2026
Code MigrationCode Quality Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: mean reviewer code-quality ratingScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	Higher measured value3.997 / 5	3.149 / 5	Vals AI Source details Data as of: 10/12/2026
CorpFin v2Shared Max Context Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 48,000 tokens	66.667 %	Higher measured value68.182 %	Vals AI Source details Data as of: 08/12/2026
EMBDCF Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	38.28 %	Higher measured value49.675 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)Comparables Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Sonnet 4.6: Compute: max, Temperature: 1, Output limit: 128,000 tokens Kimi K2.6: Top P: 0.95, Output limit: 128,000 tokens	41.003 %	Higher measured value41.069 %	Vals AI Source details Data as of: 10/12/2026
Key to the marks:better valuebetter, but not conclusivetie

Our model tests

Our tests

SVG short test

One SVG prompt and fixed output settings. Captures are shown only with 0 reported reasoning tokens or documented lack of reasoning controls. Identical test conditions do not make the models' internal compute identical.

Shared test round: 4ae5d8eeb9a9

Claude Sonnet 4.6

Kimi K2.6

Earlier tests

Pelican on a bicycle

A community classic for free-form SVG drawing.

Claude Sonnet 4.6

The response reached the token limit. No complete recording is available.

Reasoning (requested): high

Current attempt

Run date: Oct 6, 2026
API provider: openrouter
Requested API model: anthropic/claude-sonnet-4.6
API model reported in response: anthropic/claude-sonnet-4.6
Reasoning setting: high
Pinned endpoint: Anthropic | anthropic/claude-4.6-sonnet-20260217
Temperature: Provider default
Token limit including reasoning: 8,192 tokens
Test protocol: community-visual-tests-v1
Technical checks: Failed
Response time: 106 s

Not yet visually reviewed. A successful recording does not confirm correct physics or full compliance with the prompt.

Earlier attempts (2)

Oct 2, 2026API request failedReasoning setting: high
Oct 1, 2026API request failedReasoning setting: high

Kimi K2.6

Output withheld for safety

Reasoning (requested): high

Current attempt

Run date: Oct 5, 2026
API provider: openrouter
Requested API model: moonshotai/kimi-k2.6
API model reported in response: moonshotai/kimi-k2.6
Reasoning setting: high
Pinned endpoint: Moonshot AI | moonshotai/kimi-k2.6-20260420
Temperature: Provider default
Token limit including reasoning: 8,192 tokens
Test protocol: community-visual-tests-v1
Technical checks: Failed
Response time: 124 s

Not yet visually reviewed. A successful recording does not confirm correct physics or full compliance with the prompt.

Earlier attempts (3)

Oct 2, 2026Output withheld for safetyReasoning setting: high
Oct 1, 2026Output withheld for safetyReasoning setting: high
Sep 7, 2026API request failedReasoning setting: high

Prompt and test conditions

Generate an SVG of a pelican riding a bicycle

Token limit including reasoning: 8,192 tokens

Task origin (Simon Willison)

How to read this comparison

Winning one benchmark is not an overall verdict

Your workload, budget, and required context length matter most. A coding benchmark says little about visual understanding or agent performance.

The standard price table uses direct developer rates. The provider comparison labels OpenRouter endpoints, regions, and special tariffs separately.

Every result links to its measurement source and retrieval date. Labels distinguish vendor reports, official benchmark leaderboards, and independent evaluations. Disputed or archived results are excluded.

More matchups

Compare Claude Sonnet 4.6 and Kimi K2.6 with other leading models using the same data and benchmark logic.

View the complete LLM comparison

Claude Sonnet 4.6 vs. Kimi K2.6

Change model selection

General specifications

API pricing compared

Shared benchmarks

Capability profile from matched benchmarks

Our tests

SVG short test

Claude Sonnet 4.6

Kimi K2.6

Pelican on a bicycle

Winning one benchmark is not an overall verdict

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