Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.
shared result series
27
distinct benchmarks
27
latest retrieval
2026-09-29
Change model selection
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 Opus 4.8 and Gemini 3.1 Pro Preview
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 Opus 4.8 and Gemini 3.1 Pro Preview
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.
No provider tariff for Claude Opus 4.8 is available in the stored OpenRouter snapshot. The official direct price is still shown.
Provider pricing for Claude Opus 4.8 and Gemini 3.1 Pro Preview
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.
Claude Opus 4.8
Gemini 3.1 Pro Preview
Coding: 99.8 / 52.9 (5 benchmark families)
Reasoning: 96.8 / 100 (1 benchmark family)
Knowledge: 98.5 / 100 (1 benchmark family)
Finance: 100 / 84.4 (6 benchmark families)
Legal: 98.5 / 49.1 (3 benchmark families)
Agentic tasks: 100 / 97.3 (1 benchmark family)
Multimodal: 98.2 / 100 (1 benchmark family)
Search: 98.1 / 100 (1 benchmark family)
26 matched rows from 25 benchmark families were considered. The radar shows 8 of 12 comparable categories.
Claude Opus 4.8Gemini 3.1 Pro Preview
BrowseCompOverall. Higher is better. No documented setup difference
Claude Opus 4.884.3 %
Gemini 3.1 Pro PreviewWinner85.9 %
Code MigrationOverall. Higher is better. No documented setup difference
Claude Opus 4.8Winner47.25 %
Gemini 3.1 Pro Preview17.313 %
CorpFin v2Overall. Higher is better. No documented setup difference
Claude Opus 4.8Winner66.706 %
Gemini 3.1 Pro Preview64.491 %
EMBOverall. Higher is better. No documented setup difference
Claude Opus 4.8Winner69.373 %
Gemini 3.1 Pro Preview52.616 %
EnigmaEvalOverall. Higher is better. Test setup not documented as identical
Claude Opus 4.823.51% ± 2.41
Gemini 3.1 Pro PreviewHigher measured value36.78% ± 2.71
Finance Agent (v2)Overall. Higher is better. No documented setup difference
Claude Opus 4.8Winner53.918 %
Gemini 3.1 Pro Preview42.982 %
GPQA DiamondOverall. Higher is better. No documented setup difference
Claude Opus 4.892.424 %
Gemini 3.1 Pro PreviewWinner95.454 %
Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. No documented setup difference
Claude Opus 4.8Winner9.583 %
Gemini 3.1 Pro Preview0 %
Legal Research BenchOverall · All-pass. Higher is better. No documented setup difference
Claude Opus 4.8Winner43.75 %
Gemini 3.1 Pro Preview20.673 %
LegalBenchOverall. Higher is better. No documented setup difference
Claude Opus 4.883.568 %
Gemini 3.1 Pro PreviewWinner87.398 %
LiveCodeBench v6Overall. Higher is better. No documented setup difference
Claude Opus 4.887.819 %
Gemini 3.1 Pro PreviewWinner88.485 %
MedCodeOverall. Higher is better. No documented setup difference
Claude Opus 4.853.217 %
Gemini 3.1 Pro PreviewWinner59.062 %
Key to the marks:better valuebetter, but not conclusivetie
Benchmark scores for Claude Opus 4.8 and Gemini 3.1 Pro Preview
No documented difference in the test setupVersion: 1,266 tasksMetric: accuracyScoring: Higher is betterCross-vendor comparison table with browsing tools. Exact agent systems differ.
84.3 %
Editorial selection from the vendor table, not a complete extract of the comparison cohort.
Winner85.9 %
Editorial selection from the vendor table, not a complete extract of the comparison cohort.
Test setup not documented as identicalNo direct winnerVersion: open-source release 2026-07-23Metric: pass@1 accuracyScoring: Higher is betterClaude Opus 4.8: Snapshot: claude-opus-4.8-xhigh, Reasoning: xhigh, Attempts: pass@1 Gemini 3.1 Pro Preview: Snapshot: gemini-3.1-pro-preview-high, Reasoning: high, Attempts: pass@1Complex multimodal puzzles with exact answer matching and one attempt.
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.
Claude Opus 4.8
A community classic for free-form SVG drawing.
Reasoning (requested): high
Current attempt
Run date
1 Oct 2026
API provider
openrouter
Requested API model
anthropic/claude-opus-4.8
API model reported in response
anthropic/claude-opus-4.8
Reasoning setting
high
Pinned endpoint
Anthropic | anthropic/claude-4.8-opus-20260528
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
18 s
Visually reviewed. This individual test does not establish overall model quality.
Gemini 3.1 Pro Preview
The response reached the token limit. No complete recording is available.
Reasoning (requested): high
Current attempt
Run date
2 Oct 2026
API provider
openrouter
Requested API model
google/gemini-3.1-pro-preview
API model reported in response
google/gemini-3.1-pro-preview
Reasoning setting
high
Pinned endpoint
Google AI Studio | google/gemini-3.1-pro-preview-20260219
Temperature
Provider default
Token limit including reasoning
8,192 tokens
Test protocol
community-visual-tests-v1
Technical checks
Failed
Response time
61.6 s
Not yet visually reviewed. A successful recording does not confirm correct physics or full compliance with the prompt.
Earlier attempts (2)
1 Oct 2026API request failedReasoning setting: high
7 Sept 2026API request failedReasoning setting: high
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
Related LLM comparisons
Compare Claude Opus 4.8 and Gemini 3.1 Pro Preview with other leading models using the same data and benchmark logic.
