Claude Opus 5 vs Claude Opus 5.5

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

Anthropic
Claude Opus 5GA
9.5
AI Panel
Anthropic
Claude Opus 5.5GA
9.7
AI Panel

Identity & lifecycle

ProviderAnthropicAnthropic
Family / tierClaude 5 · OpusClaude 5 · Opus
StatusGAGA
Released2026-07-242026-09-22
Knowledge cutoff2026-052026-06

Architecture & context

Context window1M1M
Max output tokens128K128K
Input modalitiestext, imagetext, image
Reasoning modeoptionalalways
Open weightsNoNo

Pricing (per Mtok)

Input$5$4
Output$25$20
Cached input$0.5$0.2
Batch input$2.5$2
Free tierNoNo

Speed

Output speed (tok/s)—72.8
Time to first token (s)—23.7
Latency tiermediummedium

Trust & deployment

Trains on inputsNoNo
LicenseProprietaryProprietary
CloudsBedrock, Vertex AI, Azure AI FoundryBedrock, Vertex AI, Azure AI Foundry
ComplianceSOC2, ISO27001, ISO42001, HIPAA, CSA-STARSOC2, ISO27001, ISO42001, HIPAA

AI Panel scoring

Unified score9.59.7
Decision Maker9.59.5
Domain Strategist99.5
Finance Lead8.59
Domain Practitioner9.59
Power User99.5
Skeptic88.5
Value score8.59

Benchmarks

SWE-bench Verified96—
Humanity's Last Exam56.364.4
LMArena Elo14931504
LMArena Coding Elo15331538
Artificial Analysis Index—58

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