Gemini 3.1 Pro vs Claude Opus 4.8 vs GPT-5.5

Best cell per row highlighted. Null means undisclosed — never counted as zero.

Google
Gemini 3.1 Propreview
8.7
AI Panel
Anthropic
Claude Opus 4.8GA
9.2
AI Panel
OpenAI
GPT-5.5GA
8.7
AI Panel

Identity & lifecycle

ProviderGoogleAnthropicOpenAI
Family / tierGemini 3 · ProClaude 4 · OpusGPT-5 · Pro
StatuspreviewGAGA
Released2026-02-192026-05-282026-04-24
Knowledge cutoff2025-012026-012025-12

Architecture & context

Context window1.0M1M1.1M
Max output tokens66K128K128K
Input modalitiestext, image, audio, videotext, imagetext, image
Reasoning modeoptionalalwaysoptional
Open weightsNoNoNo

Pricing (per Mtok)

Input$2$5$5
Output$12$25$30
Cached input$0.2$0.5$0.5
Batch input$1$2.5$2.5
Free tierNoNoNo

Speed

Output speed (tok/s)142.76068.7
Time to first token (s)30.780.564
Latency tierslowmediumslow

Trust & deployment

Trains on inputsNoNoNo
LicenseProprietaryProprietaryProprietary
CloudsVertex AI, GCPBedrock, Vertex AI, Azure AI FoundryAzure OpenAI, Azure AI Foundry
ComplianceSOC2, HIPAA, GDPR, ISO27001, FedRAMP, CCPASOC2, HIPAA, GDPR, ISO27001SOC2, GDPR, CCPA, HIPAA

AI Panel scoring

Unified score8.79.28.7
Decision Maker999
Domain Strategist998.8
Finance Lead8.58.57
Domain Practitioner8.59.59.2
Power User8.599
Skeptic7.587.8
Value score8.586.5

Benchmarks

MMLU92.6——
MMLU-Pro——92.4
GPQA Diamond94.393.693.6
SWE-bench Verified80.688.688.7
LiveCodeBench2887——
MMMU80.5—81.2
TAU-bench90.8—98
Terminal-Bench68.574.682.7
MRCR Long Context84.9—74
Humanity's Last Exam44.4—41.4
LMArena Elo148714811482
LMArena Coding Elo152015331520

Scores link to their sources. Missing cells mean the vendor hasn't disclosed a result — honesty over padding.