Claude Opus 4.8 vs Claude Fable 5

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

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

Identity & lifecycle

ProviderAnthropicAnthropic
Family / tierClaude 4 · OpusClaude 5 · Fable
StatusGAGA
Released2026-05-272026-06-08
Knowledge cutoff

Architecture & context

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

Pricing (per Mtok)

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

Speed

Output speed (tok/s)60
Time to first token (s)0.5
Latency tiermediumslow

Trust & deployment

Trains on inputsNoNo
LicenseProprietaryProprietary
CloudsBedrock, Vertex AI, Azure AI FoundryBedrock, Vertex AI, Azure AI Foundry
ComplianceSOC2, HIPAA, GDPR, ISO27001SOC2, HIPAA, GDPR, ISO27001

AI Panel scoring

Unified score9.29.5
Decision Maker99.5
Domain Strategist99.5
Finance Lead8.57
Domain Practitioner9.59.5
Power User99
Skeptic87.5
Value score86.5

Benchmarks

GPQA Diamond93.6
SWE-bench Verified88.695
Terminal-Bench74.688

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