Frontier Log

Anthropic

Claude Fable 5.2

Released · anthropic.com

Price

Per 1M tokensInputCachedOutput
Cache writes $10 (5 minutes), $16 (1 hour)$8$0.20$40
Price history
DateInputCachedOutput
anthropic.com · 2 · Corroborated$8$0.20$40

Context window

TokensContext windowOutput limit
Default1M128K
Context history
DateContext windowOutput limit
platform.claude.com · 2 · 3 · Corroborated1M128K

Benchmark results

BenchmarkScore
Humanity's Last ExamNo tools, full set · adaptive thinking, max effort; average of 5 trials73.2%
Humanity's Last ExamWith tools, full set · highest available effort; safeguards on74.2%Corroborated The same number is printed in 1 other lab document: 1
SWE-bench ProSet not stated · adaptive thinking, max effort; average of 5 trials93.0%
Terminal-Bench 4.0Claude Code in --bare mode; max effort; safeguards on; no internet access; 10 trials per task67.6%
Terminal-Bench Science 0.1highest available effort; safeguards on74.6%Corroborated The same number is printed in 1 other lab document: 1
AutomationBench 1.0.6Private set · Run by Zapier · highest available effort; safeguards on; set and release 1.0.6 named in the system card, which prints the same figure51.4%Corroborated The same number is printed in 1 other lab document: 1
Run by Zapier · low effort; default fallbacks on · in Claude Fable 5.2 and Claude Mythos 5.2 System Card39.7%
OSWorld 2.1Offline set, partial score · highest available effort; safeguards on89.3%Corroborated The same number is printed in 1 other lab document: 1
OSWorld 2.1Offline set, strict pass rate · 82-task offline set, no internet access; max effort; mean of 5 attempts54.6%
DeepSWE v1.1average of 5 trials74.3%
ARC-AGI-3Set not stated · Run by ARC Prize Foundation · Standard harness; high effort79.26%
Run by ARC Prize Foundation · Provider Adapter harness; high effort97.72%
Run by ARC Prize Foundation · Standard harness; max effort65.66%
Run by ARC Prize Foundation · Provider Adapter harness; max effort94.90%
ChartographyNo tools · highest available effort; safeguards on73.4%Corroborated The same number is printed in 1 other lab document: 1
medium effort66.4%
separate run for the redrawn-chart check; max effort; average of 5 runs · in Claude Fable 5.2 and Claude Mythos 5.2 System Card74.3%
ChartographyWith tools · adaptive thinking, max effort; container and image-cropping tool; average of 5 runs; Gemini 3.5 Flash grader91.6%
Sources

Reported by Anthropic

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