Claude Opus 4.8 vs Gemini 3.1 Pro

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

Anthropic
Claude Opus 4.8GA
9.2
AI Panel
Google
Gemini 3.1 Propreview
8.7
AI Panel

Identity & lifecycle

ProviderAnthropicGoogle
Family / tierClaude 4 · OpusGemini 3 · Pro
StatusGApreview
Released2026-05-282026-02-19
Knowledge cutoff2026-012025-01

Architecture & context

Context window1M1.0M
Max output tokens128K66K
Input modalitiestext, imagetext, image, audio, video
Reasoning modealwaysoptional
Open weightsNoNo

Pricing (per Mtok)

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

Speed

Output speed (tok/s)60142.7
Time to first token (s)0.530.78
Latency tiermediumslow

Trust & deployment

Trains on inputsNoNo
LicenseProprietaryProprietary
CloudsBedrock, Vertex AI, Azure AI FoundryVertex AI, GCP
ComplianceSOC2, HIPAA, GDPR, ISO27001SOC2, HIPAA, GDPR, ISO27001, FedRAMP, CCPA

AI Panel scoring

Unified score9.28.7
Decision Maker99
Domain Strategist99
Finance Lead8.58.5
Domain Practitioner9.58.5
Power User98.5
Skeptic87.5
Value score88.5

Benchmarks

MMLU—92.6
GPQA Diamond93.694.3
SWE-bench Verified88.680.6
LiveCodeBench—2887
MMMU—80.5
TAU-bench—90.8
Terminal-Bench74.668.5
MRCR Long Context—84.9
Humanity's Last Exam—44.4
LMArena Elo14811487
LMArena Coding Elo15331520

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