Claude Mythos Preview
Anthropic · Proprietary · bench-align-v5
Capability shape
Seven axes from the ranking source. A missing axis is drawn as a gap.
Runtime service evidence
Measured values with the date they were observed. Nothing is inferred from a sibling model or a provider claim.
Time to first token: latency to the first answer chunk (Artificial Analysis, via BenchLM). Reasoning models include thinking time, so values can run to tens or hundreds of seconds.
Evidence key: Unavailable
| Measurement | Value | Observed | Last good | Evidence |
|---|---|---|---|---|
| Time to first token | Unavailable | Unavailable | Unavailable | |
| Throughput | Unavailable | Unavailable | Unavailable |
Regional or per-endpoint measurements appear only when the API supplies them; none are modelled here.
Endpoint and price matrix
Every published price component, including cache reads and writes.
| Component | USD | Evidence |
|---|---|---|
| Input / 1M tokens | $25.00 | |
| Output / 1M tokens | $125.00 | |
| Cache read / 1M tokens | Unavailable | |
| Cache write / 1M tokens | Unavailable | |
| Blended / 1M (75% input / 25% output) | $50.00 |
Workload-aware monthly cost example
10 conversations per day × 8 messages × 22 active days, 1200 input and 400 output tokens per message, no cache. This uses the same calculator as the cost simulator, so an unavailable applicable rate makes the example unavailable too.
Benchmark record
5 matched benchmark rows with their published value, unit, and provenance.
Agentic
| Benchmark | Value | Tasks | Difficulty | Provenance |
|---|---|---|---|---|
| CyberGym CyberGym | 83.1 | 1,507 vulnerability analysis instances | Real-world cybersecurity | CyberGym: Evaluating AI Agents' Real-World Cybersecurity Capabilities at Scale |
| ExploitGym ExploitGym | 17.5 | 898 exploitation tasks | Advanced cybersecurity exploitation | ExploitGym: Can AI Agents Turn Security Vulnerabilities into Real Attacks? |
external
| Benchmark | Value | Tasks | Difficulty | Provenance |
|---|---|---|---|---|
| ExploitBench ExploitBench v8-bench | 69 | V8 exploit synthesis runs | Browser exploitation and cybersecurity | ExploitBench |
| SCONE post-cutoff success SCONE Post-Cutoff Exploit Success | 100 | 12 post-cutoff smart-contract vulnerabilities | Smart-contract exploitation | Evaluating frontier models on software exploitation |
| SCONE simulated revenue SCONE Post-Cutoff Simulated Exploit Revenue | 35 | 12 post-cutoff smart-contract vulnerabilities | Smart-contract exploitation | Evaluating frontier models on software exploitation |
Lifecycle and limitations log
Lifecycle events the source associates with this model, plus what this profile does not claim.
That is not evidence the model has no lifecycle plan — only that this source published none.