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Claude Fable 5 vs GPT-5.6 Terra

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Claude Fable 5GPT-5.6 Terra
AttributeClaude Fable 5Anthropic · 48 in the newsGPT-5.6 TerraOpenAI
Scores
Intelligence (ECI)162159
Coding9879
Math9795
Reasoning & Knowledge9074
Agentic & Tools9845
Specifications
DeveloperAnthropicOpenAI
FamilyClaudeGPT
ReleasedJun 9, 2026Jul 9, 2026
Parameters
AvailabilityAPI accessAPI access
Context window1M1.1M
Price — $/M input$10.00$2.00
Price — $/M output$50.00$12.00
Inputstext, image, filefile, image, text
Outputstexttext
Benchmarks
AIME 2024/2025100%100%
APEX45%
ARC-AGI99%97%
ARC-AGI-289%84%
GPQA Diamond86%93%
Humanity's Last Exam56%43%
SciCode60%54%
SimpleBench82%49%
SimpleQA Verified68%43%
WebDev Arena16541522
WeirdML92%78%
τ²-bench99%86%

Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.

Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.

Claude Fable 5 vs GPT-5.6 Terra — comparison