Claude Opus 4.6 vs Claude Fable 5 vs Claude Opus 4.8

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

Anthropic
Claude Opus 4.6GA
8.6
AI Panel
Anthropic
Claude Fable 5GA
9.5
AI Panel
Anthropic
Claude Opus 4.8GA
9.2
AI Panel

Identity & lifecycle

ProviderAnthropicAnthropicAnthropic
Family / tierClaude 4 · OpusClaude 5 · FableClaude 4 · Opus
StatusGAGAGA
Released2026-02-042026-06-082026-05-27
Knowledge cutoff2025-05

Architecture & context

Context window1M1M1M
Max output tokens128K128K128K
Input modalitiestext, imagetext, image, filetext, image
Reasoning modeoptionalalwaysalways
Open weightsNoNoNo

Pricing (per Mtok)

Input$5$10$5
Output$25$50$25
Cached input$0.5$1$0.5
Batch input$2.5$5$2.5
Free tierNoNoNo

Speed

Output speed (tok/s)45.960
Time to first token (s)1.760.5
Latency tierslowslowmedium

Trust & deployment

Trains on inputsNoNoNo
LicenseProprietaryProprietaryProprietary
CloudsBedrock, Vertex AI, Azure AI FoundryBedrock, Vertex AI, Azure AI FoundryBedrock, Vertex AI, Azure AI Foundry
ComplianceSOC2, HIPAA, GDPR, ISO27001SOC2, HIPAA, GDPR, ISO27001SOC2, HIPAA, GDPR, ISO27001

AI Panel scoring

Unified score8.69.59.2
Decision Maker8.59.59
Domain Strategist8.59.59
Finance Lead8.578.5
Domain Practitioner8.59.59.5
Power User8.599
Skeptic87.58
Value score7.86.58

Benchmarks

MMLU-Pro88.3
GPQA Diamond91.393.6
AIME 202585
SWE-bench Verified80.89588.6
HumanEval95
MMMU77.3
TAU-bench91.9
Terminal-Bench65.48874.6
MRCR Long Context76
Humanity's Last Exam53.1
LMArena Elo1490
LMArena Coding Elo1535
Artificial Analysis Index53

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