Published reference2026-06-09
SWE-bench Verified
swe-bench-verified · 500 tasks. Compare only matched task sets and protocols.
Claude Fable 5 · Anthropic system card · Anthropic · Anthropic evaluation
↗ Published resultSWE-bench Verified
Claude Fable 5 and Mythos 5 System Card, section 8.2 ↗Tokens per second · see measurement basis
As recorded on this receipt
Run configuration & provenance +
- Context
- Not recorded
- Temperature
- Not recorded
- Wall time
- Not recorded
- Weight file
- Provider-managed / not reported
- Revision
- Not reported
- Reasoning
- Not reported
- Agent version
- Not reported
- Output token limit
- Not reported
- Dataset revision
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- Harness host
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- Model host
- Published reference
- Input tokens
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- Output tokens
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- Cached input tokens
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- Agent turn / step limit
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- Concurrency
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- Weight file size
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Throughput measurement: Measurement method not separately reported. This should not be treated as standardized decode-only speed.
Anthropic standard configuration · adaptive thinking max effort · default sampling · 5-trial average. Fable production safeguards include Opus 4.8 fallback. n=500. Thinking blocks included.
Section 8.2: SWE-bench Verified is a 500-problem subset. Fable 5 achieved 95%. Table 8.1.A lists 95. Average over five trials, standard configuration, thinking blocks included. Fable scores reflect production safeguards, including fallback to Opus 4.8. Mythos 5 95.5 is not applied to Fable. Not a LocalsOnly desk run.
Run ID: research-claude-fable-5-claude-code-max-anthropic-system-card-swe-bench-verifiedTask explorer
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