Claude Fable 5 vs Codestral (25.08) vs GPT-5.4

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

Anthropic
Claude Fable 5GA
9.5
AI Panel
Mistral AI
Codestral (25.08)GA
7.6
AI Panel
OpenAI
GPT-5.4GA
8.7
AI Panel

Identity & lifecycle

ProviderAnthropicMistral AIOpenAI
Family / tierClaude 5 · FableCodestral · CoderGPT-5 · Medium
StatusGAGAGA
Released2026-06-092025-07-312026-03-05
Knowledge cutoff2026-012025-052025-08

Architecture & context

Context window1M128K1.1M
Max output tokens128K16K128K
Input modalitiestext, image, filetexttext, image
Reasoning modealwaysnoneoptional
Open weightsNoNoNo

Pricing (per Mtok)

Input$10$0.3$2.5
Output$50$0.9$15
Cached input$1$0.03$0.25
Batch input$5$0.15$1.25
Free tierNoYesNo

Speed

Output speed (tok/s)——86.3
Time to first token (s)——1.2
Latency tierslowfastmedium

Trust & deployment

Trains on inputsNoNoNo
LicenseProprietaryProprietaryProprietary
CloudsBedrock, Vertex AI, Azure AI FoundryBedrock, Azure AI Foundry, Vertex AIAzure OpenAI, Azure AI Foundry
ComplianceSOC2, HIPAA, GDPR, ISO27001SOC2, ISO27001, GDPRSOC2, GDPR, CCPA, HIPAA

AI Panel scoring

Unified score9.57.68.7
Decision Maker9.57.59
Domain Strategist9.57.58.7
Finance Lead789
Domain Practitioner9.589
Power User97.58.5
Skeptic7.578
Value score6.58.58.5

Benchmarks

GPQA Diamond——92.8
SWE-bench Verified95——
HumanEval—86.6—
MMMU——81.2
Terminal-Bench88—75.1
MRCR Long Context——36.6
Humanity's Last Exam——39.8
LMArena Elo1506—1476
LMArena Coding Elo1552—1520

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