Head-to-head comparison

GPT-5.6 Terra vs. Grok 4.7

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

shared result series: 20
distinct benchmarks: 20
latest retrieval: 2026-09-29

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 GPT-5.6 Terra and Grok 4.7
Attribute	GPT-5.6 Terra	Grok 4.7
Provider	OpenAI	xAI
Released	Jul 9, 2026	Sep 21, 2026
Availability	Active	Active
Model type	Proprietary	Proprietary
Parameters	Not published	Not published
Architecture	Not published	Not published
Context window	1,050,000 tokens	500,000 tokens
Knowledge cutoff	February 16, 2026	May 2026
Technical sources	Model, Context, Knowledge cutoff	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 GPT-5.6 Terra and Grok 4.7
Price type	GPT-5.6 Terra	Grok 4.7
API input	$2 ≤272K / $4 >272K	$2 ≤200K / $4 >200K
API output	$12 ≤272K / $18 >272K	$6 ≤200K / $12 >200K
Cache read	$0.2 ≤272K / $0.4 >272K	$0.5 ≤200K / $1 >200K
Cache write (5 min.)	$2.5 ≤272K / $5 >272K	Not listed
Cache write (1 hr.)	Not listed	Not listed
Price verified	09/22/2026 Source	09/23/2026 Source

GPT-5.6 TerraGrok 4.7

API inputUSD per 1M tokens, base tier

GPT-5.6 Terra$2

Grok 4.7$2

API outputUSD per 1M tokens, base tier

GPT-5.6 Terra$12

Grok 4.7$6

Cache readUSD per 1M tokens, base tier

GPT-5.6 Terra$0.2

Grok 4.7$0.5

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 GPT-5.6 Terra and Grok 4.7
Model	Provider	Purchase route and tariff	Input per 1M tokens	Output per 1M tokens	Source
GPT-5.6 Terra	OpenAI	Direct from developerUp to 272,000 context tokens	$2	$12	Source09/22/2026
	OpenAI	Direct from developerAbove 272,000 context tokens	$4	$18	Source09/22/2026
	Amazon Bedrock	Via OpenRouteramazon-bedrock/us-east-1	$2.2	$13.2	Source10/05/2026
	Azure	Via OpenRouterazure	$2	$12	Source10/05/2026
	Azure	Via OpenRouterazure/eu	$2.2	$13.2	Source10/05/2026
	Azure	Via OpenRouterazure/us	$2.2	$13.2	Source10/05/2026
	OpenAI	Via OpenRouteropenai	$2	$12	Source10/05/2026
	OpenAI	Via OpenRouteropenai/fast	$4	$24	Source10/05/2026
	OpenAI	Via OpenRouteropenai/flex	Lowest listed price: $1	Lowest listed price: $6	Source10/05/2026
Grok 4.7	xAI	Direct from developerUp to 200,000 context tokens	Lowest listed price: $2	Lowest listed price: $6	Source09/23/2026
	xAI	Direct from developerAbove 200,000 context tokens	$4	$12	Source09/23/2026
	xAI	Via OpenRouterxai	Lowest listed price: $2	Lowest listed price: $6	Source10/05/2026
	xAI	Via OpenRouterxai/priority	$4	$12	Source10/05/2026
	xAI	Via OpenRouterxai/zdr	Lowest listed price: $2	Lowest listed price: $6	Source10/05/2026
	xAI	Via OpenRouterxai/zdr/priority	$4	$12	Source10/05/2026
	xAI	Via OpenRouterxai/zdr/us	$2.2	$6.6	Source10/05/2026

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.

GPT-5.6 Terra

Grok 4.7

Coding: 95.9 / 91.9 (5 benchmark families)

Mathematics: 100 / 35.1 (1 benchmark family)

Finance: 99.4 / 98.7 (3 benchmark families)

Legal: 64.8 / 99.7 (3 benchmark families)

Agentic tasks: 100 / 94.7 (1 benchmark family)

Productivity: 95.1 / 100 (1 benchmark family)

Cybersecurity: 100 / 96.4 (1 benchmark family)

Health: 90.2 / 100 (2 benchmark families)

20 matched rows from 19 benchmark families were considered. The radar shows 8 of 11 comparable categories.

GPT-5.6 TerraGrok 4.7

Code MigrationOverall. Higher is better. No documented setup difference

GPT-5.6 Terra47.804 %

Grok 4.744.816 %

CyberBench v1.1Overall. Higher is better. No documented setup difference

GPT-5.6 Terra72.084 %

Grok 4.769.464 %

EMBOverall. Higher is better. No documented setup difference

GPT-5.6 Terra66.205 %

Grok 4.766.991 %

Finance Agent (v2)Overall. Higher is better. No documented setup difference

GPT-5.6 Terra54.436 %

Grok 4.752.251 %

Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. No documented setup difference

GPT-5.6 Terra0.833 %

Grok 4.712.5 %

IOIOverall. Higher is better. No documented setup difference

GPT-5.6 Terra87.611 %

Grok 4.757.722 %

Legal Research BenchOverall · All-pass. Higher is better. No documented setup difference

GPT-5.6 Terra41.346 %

Grok 4.747.115 %

LegalBenchOverall. Higher is better. No documented setup difference

GPT-5.6 Terra85.105 %

Grok 4.784.389 %

MedCodeOverall. Higher is better. No documented setup difference

GPT-5.6 Terra43.414 %

Grok 4.749.553 %

MedScribeOverall. Higher is better. No documented setup difference

GPT-5.6 Terra82.869 %

Grok 4.789.377 %

ProgramBenchOverall. Higher is better. No documented setup difference

GPT-5.6 Terra0.5 %

Grok 4.70.5 %

ProofBenchOverall. Higher is better. No documented setup difference

GPT-5.6 Terra74 %

Grok 4.726 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for GPT-5.6 Terra and Grok 4.7
Benchmark and task	GPT-5.6 Terra	Grok 4.7	Source
Code MigrationOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner47.804 %	44.816 %	Vals AI Source details Data as of: 09/27/2026
CyberBench v1.1Overall Test details No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is better	Winner72.084 %	69.464 %	Vals AI Source details Data as of: 09/27/2026
EMBOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	66.205 %	Winner66.991 %	Vals AI Source details Data as of: 09/27/2026
Finance Agent (v2)Overall Test details No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is better	Winner54.436 %	52.251 %	Vals AI Source details Data as of: 09/27/2026
Harvey's Legal Agent BenchmarkOverall · Task fully resolved Test details No documented difference in the test setupVersion: 1Metric: task resolution rateScoring: Higher is better	0.833 %	Winner12.5 %	Vals AI Source details Data as of: 09/27/2026
IOIOverall Test details No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is better	Winner87.611 %	57.722 %	Vals AI Source details Data as of: 09/27/2026
Legal Research BenchOverall · All-pass Test details No documented difference in the test setupVersion: 1Metric: all-pass rateScoring: Higher is better	41.346 %	Winner47.115 %	Vals AI Source details Data as of: 09/27/2026
LegalBenchOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner85.105 %	84.389 %	Vals AI Source details Data as of: 09/27/2026
MedCodeOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	43.414 %	Winner49.553 %	Vals AI Source details Data as of: 09/26/2026
MedScribeOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	82.869 %	Winner89.377 %	Vals AI Source details Data as of: 09/26/2026
ProgramBenchOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Tie0.5 %	Tie0.5 %	Vals AI Source details Data as of: 09/27/2026
ProofBenchOverall Test details No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is better	Winner74 %	26 %	Vals AI Source details Data as of: 09/28/2026
Public Benefits Bench v1.1Overall Test details No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is better	62.382 %	Winner65.629 %	Vals AI Source details Data as of: 09/27/2026
SAGEOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	Winner47.003 %	40.79 %	Vals AI Source details Data as of: 09/26/2026
Tax Agent BenchOverall Test details No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better	65.199 %	Winner65.596 %	Vals AI Source details Data as of: 09/27/2026
Terminal-Bench 2.1Overall Test details No documented difference in the test setupVersion: 2.1Metric: accuracyScoring: Higher is better	Winner77.528 %	73.408 %	Vals AI Source details Data as of: 09/27/2026
Terminal-Bench 4.0Overall Test details No documented difference in the test setupVersion: 4.0Metric: accuracyScoring: Higher is better	26.263 %	Winner28.283 %	Vals AI Source details Data as of: 09/27/2026
Terminal-Bench ScienceOverall Test details No documented difference in the test setupVersion: 0.1Metric: accuracyScoring: Higher is better	10 %	Winner11.429 %	Vals AI Source details Data as of: 09/27/2026
Vals IndexOverall Test details No documented difference in the test setupVersion: 2Metric: weighted index scoreScoring: Higher is better	59.588 %	Winner60.215 %	Vals AI Source details Data as of: 09/27/2026
Vibe Code Bench v1.1Overall Test details No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is betterSettings: Harness: OpenHands	74.594 %	Winner86.175 %	Vals AI Source details Data as of: 09/27/2026
Key to the marks:better valuebetter, but not conclusivetie

Our model tests

Our tests

Compare how the models respond to the same prompt. Each test shows the latest attempt, with no subsequent fixes to the generated code. Earlier runs remain available in the test details. These results do not contribute to an overall score.

Pelican on a bicycle

A community classic for free-form SVG drawing.

GPT-5.6 Terra

Reasoning (requested): high

Current attempt

Run date: 7 Sept 2026
API provider: openrouter
Requested API model: openai/gpt-5.6-terra
API model reported in response: openai/gpt-5.6-terra
Reasoning setting: high
Pinned endpoint: OpenAI | openai/gpt-5.6-terra-20260709
Temperature: Provider default
Token limit including reasoning: 8,192 tokens
Test protocol: community-visual-tests-v1
Technical checks: Passed, not a quality rating
Response time: 64.6 s

Visually reviewed. This individual test does not establish overall model quality.

Grok 4.7

Reasoning (requested): high

Current attempt

Run date: 1 Oct 2026
API provider: openrouter
Requested API model: x-ai/grok-4.7
API model reported in response: x-ai/grok-4.7
Reasoning setting: high
Pinned endpoint: xAI | x-ai/grok-4.7-20260916
Temperature: Provider default
Token limit including reasoning: 8,192 tokens
Test protocol: community-visual-tests-v1
Technical checks: Passed, not a quality rating
Response time: 13.4 s

Visually reviewed. This individual test does not establish overall model quality.

Earlier attempts (1)

1 Oct 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 GPT-5.6 Terra and Grok 4.7 with other leading models using the same data and benchmark logic.

View the complete LLM comparison