Anthropic model product
Claude Mythos
Claude Mythos is an unreleased general-purpose frontier model from Anthropic, positioned above Opus and not planned for general availability.
Updated Sep 8, 2026. Default version: Claude Mythos Preview
LLMBoard Score91.3Claude Mythos Preview
Coverage40%15 benchmark families
Context windowN/ATokens
Official input priceN/AOfficial price unavailable
Claude Mythos Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
Claude Mythos Benchmark Results
Benchmark scores for Claude Mythos Preview.
Sort by
Benchmark | Score | Rank | Participants | Percentile | Evidence | Evaluated |
|---|
| BenchmarkCharXiv-R | Score93.20% | Rank01 | Participants55 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkCyBench | Score100.00% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkFigQA | Score89.00% | Rank01 | Participants3 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkMMMLU | Score92.70% | Rank01 | Participants49 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkSWE-bench Multilingual | Score87.30% | Rank01 | Participants43 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkSWE-Bench Multimodal | Score59.00% | Rank01 | Participants4 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkUSAMO25 | Score97.60% | Rank01 | Participants3 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkGPQA | Score94.60% | Rank02 | Participants247 | Percentile99.59% | EvidenceC | Evaluated |
| BenchmarkSWE-Bench Pro | Score77.80% | Rank02 | Participants55 | Percentile98.15% | EvidenceC | Evaluated |
| BenchmarkSWE-Bench Verified | Score93.90% | Rank02 | Participants113 | Percentile99.11% | EvidenceC | Evaluated |
| BenchmarkTerminal-Bench 2.0 | Score82.00% | Rank02 | Participants51 | Percentile98.00% | EvidenceC | Evaluated |
| BenchmarkGraphwalks BFS >128k | Score80.00% | Rank03 | Participants11 | Percentile80.00% | EvidenceC | Evaluated |
| BenchmarkHumanity's Last Exam | Score64.70% | Rank03 | Participants103 | Percentile98.04% | EvidenceC | Evaluated |
| BenchmarkCyberGym | Score83.10% | Rank05 | Participants15 | Percentile71.43% | EvidenceC | Evaluated |
| BenchmarkBrowseComp | Score86.90% | Rank07 | Participants63 | Percentile90.32% | EvidenceC | Evaluated |
| BenchmarkOSWorld-Verified | Score79.60% | Rank08 | Participants24 | Percentile69.57% | EvidenceC | Evaluated |
Claude Mythos Arena Results
Preference and agent-evaluation results for the default version.
No Arena results
The default version does not have a matching Arena result yet.
Claude Mythos Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- N/A
- Official provider
- N/A
- Lowest third-party
- N/A
- Tracked offerings
- 0
No provider prices
The default version has no current input or output token prices.
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
Claude Mythos Runtime Performance
Provider-specific output speed and catalog latency for Claude Mythos Preview. Runtime does not affect the capability score.
No runtime data
No provider-specific speed or latency record is linked to the default version yet.
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
Claude Mythos Specifications
Technical details for the model's default version.
- Version
- Claude Mythos Preview
- Released
- Unknown
- Knowledge cutoff
- Unknown
- Parameters
- N/A
- Context window
- N/A
- Max output
- N/A
- Inputs
- image, text
- Outputs
- text
- Open weights
- No
- License
- Proprietary
Claude Mythos Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionClaude Mythos Preview | ReleasedN/A | LLMBoard91.30 | ParametersN/A | ContextN/A | Max outputN/A | Open weightsNo | LicenseProprietary |
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What is Claude Mythos?
Key information about Claude Mythos and its available data.
” It is described as a new tier above Opus and is deployed under ASL-3 Standard.
Data as of 2026-09-08.
FAQ
Common questions about Claude Mythos.
When was Claude Mythos released?
A release date is not available for the default version.
How much does Claude Mythos cost?
No official standard PAYG price is currently available for Claude Mythos.
Who created Claude Mythos?
Claude Mythos was created by Anthropic.
What is the context window for Claude Mythos?
A context window is not available for the default version.
Is Claude Mythos open weight?
No. The default version is not marked as having publicly available weights.
How many API providers offer Claude Mythos?
No provider offering is currently linked to the default version.