Claude Opus 4.5 vs Claude Fable 5 vs Claude Opus 4.8

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

Anthropic
Claude Opus 4.5GA
8.0
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
Released2025-11-232026-06-082026-05-27
Knowledge cutoff2025-05

Architecture & context

Context window200K1M1M
Max output tokens64K128K128K
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)53.260
Time to first token (s)1.580.5
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 score89.59.2
Decision Maker7.59.59
Domain Strategist89.59
Finance Lead878.5
Domain Practitioner89.59.5
Power User899
Skeptic7.57.58
Value score7.56.58

Benchmarks

MMLU90.8
MMLU-Pro90
GPQA Diamond8793.6
SWE-bench Verified80.99588.6
HumanEval92
MMMU80.7
TAU-bench88.9
Terminal-Bench59.88874.6
Humanity's Last Exam43.4
LMArena Elo1468
LMArena Coding Elo1510
Artificial Analysis Index43

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