Claude Mythos 5
Anthropic
- Released
- June 9, 2026
- Data date
- July 30, 2026
Category view
Position within the category
This overview uses only published data from matching cohorts. Missing values never change a rank.
This model does not yet have enough published values for an overall rank. It covers 0 of 4 required comparison cohorts.
- Coverage
- 0 / 4
Leaderboard
Measurements
Comparable benchmark results
Each chart contains exactly one source, one measurement series, and one stored comparison cohort. Bars show the position. The measured value appears on the right.
BrowseComp
88% · Rank 1 of 5
Comparison cohort: browsecomp-openai-gpt-5-6-table · Data date: September 2, 2026
5 of 5 model versions shown in this chart. A higher value ranks first.
Cross-vendor comparison table with browsing tools. Exact agent systems differ.
Editorial selection from the vendor table, not a complete extract of the comparison cohort.
SWE-Bench Pro
80.3% · Rank 1 of 5
Comparison cohort: swe-pro-openai-gpt-5-6-release · Data date: September 2, 2026
5 of 5 model versions shown in this chart. A higher value ranks first.
Comparison table published by OpenAI. Not a Gradually test.
After an audit, OpenAI estimates that about 30% of the public tasks are broken. The result therefore remains a disputed secondary signal. The rows are an editorial selection from the respective comparison table.
Profile
Specifications and access
Published information about this model. Unknown values are not estimated.
- Model type
- ProprietarySource
- Context window
- 1,000,000 tokensSource
- Knowledge cutoff
- January 2026Source
- Notes
- Shares Fable 5's specs and pricing, without the safety classifiers. Invitation-only limited availability via Project Glasswing for vetted cybersecurity/biomedical/infrastructure partners, no self-serve signup. Briefly suspended 2026-06-12 to 2026-06-30 under the same export control directive as Fable 5; access restored 2026-07-01.Source
Pricing
Published prices
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Head-to-head comparisons
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Evidence
Primary sources and data date
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