BlogLLM Benchmark Scores as Published, Side by Side
Claude Mythos 5: Benchmark Scores as Published
Every result the catalog holds for Claude Mythos 5: 39 tests in 14 areas, from 8 pages. 32 printed by Anthropic itself, the rest by the company named beside each number. Each number is as printed; nothing is ranked or rescored.
Developer AnthropicReleased 2026-06-09Context window 1MMax output 128KInput Text, imageOutput TextWeights ClosedData version 2026103001, as of 2026-10-30
Knowledge Work
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| AutomationBench | 17.4% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15 | - |
| GDPval-AA (Elo) | 1932 | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15 | - |
| Harvey's Legal Agent Benchmark | 13.3% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15 | - |
| OfficeQA Pro | 67.1% | Anthropic, System Card: Claude Fable 5.1 & Claude Mythos 5.1checked 2026-10-25 | - |
| OfficeQA | 79% | Anthropic, System Card: Claude Fable 5.1 & Claude Mythos 5.1checked 2026-10-25 | - |
Agentic Coding
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| SWE-Bench Pro | 80.3% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15; printed on 1 more page | - |
| Terminal-Bench 2.1 | 88% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15; printed on 1 more page | - |
| FrontierCode (Diamond) | 29.3% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15 | Effort: xhigh |
Science and Math
Long Context
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| GraphWalks BFS 1M (F1) | 79.4% | OpenAI, GPT-5.6: Frontier intelligence that scales with your ambitionchecked 2026-10-15 | Context: 1M |
| GraphWalks BFS 256k (F1) | 91.1% | OpenAI, GPT-5.6: Frontier intelligence that scales with your ambitionchecked 2026-10-15 | Context: 256k |
Computer Use
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| OSWorld-Verified | 85% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15 | - |
Multimodal Understanding
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| GDP.pdf | 29.8% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15 | Tools: none |
Cybersecurity
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| ExploitBench | 78% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15; printed on 1 more page | - |
General Knowledge and Reasoning
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| Humanity's Last Exam (no tools) | 59% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15 | Tools: none |
| Humanity's Last Exam (with tools) | 64.5% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15 | Tools: enabled; exact tools in source |
Tool Use and Workflows
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| Toolathlon | 61.7% | OpenAI, GPT-5.6: Frontier intelligence that scales with your ambitionchecked 2026-10-15 | - |
| Toolathlon Verified | 79.3% | Anthropic, System Card: Claude Fable 5.1 & Claude Mythos 5.1checked 2026-10-25; printed on 2 more pages | Effort: max |
| Toolathlon Verified Pass@3 | 86.1% | Anthropic, System Card: Claude Fable 5.1 & Claude Mythos 5.1checked 2026-10-25; printed on 2 more pages | Effort: max |
| Toolathlon Verified Pass^3 | 73.1% | Anthropic, System Card: Claude Fable 5.1 & Claude Mythos 5.1checked 2026-10-25; printed on 2 more pages | Effort: max |
| Toolathlon Verified average assistant turnslower is better | 19.8 | Anthropic, System Card: Claude Fable 5.1 & Claude Mythos 5.1checked 2026-10-25; printed on 1 more page | Effort: max |
Web Search and Research
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| BrowseComp | 88% | OpenAI, GPT-5.6: Frontier intelligence that scales with your ambitionchecked 2026-10-15 | - |
Healthcare
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| HealthBench Professional | 66% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15; printed on 1 more page | - |
Safety and Alignment
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| Self-preference bias, Claude-identity system prompt (0-9 scale)lower is better | 0.01 | Anthropic, Claude Haiku 5.5 System Cardchecked 2026-10-19 | - |
| Self-preference bias, no system prompt (0-9 scale)lower is better | 0.04 | Anthropic, Claude Haiku 5.5 System Cardchecked 2026-10-19 | - |
| Rate of reaching outside the sandboxlower is better | 75% | Anthropic, Claude Haiku 5.5 System Cardchecked 2026-10-19 | - |
Engineering and Design
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| BenchCAD | 38.4% | OpenAI, GPT-5.6: Frontier intelligence that scales with your ambitionchecked 2026-10-15 | - |
| Blueprint-Bench 2 (normalized score) | 38.6% | Anthropic, Claude Fable 5 and Claude Mythos 5checked 2026-10-15 | - |
| BenchCAD (python tool) | 65% | OpenAI, GPT-5.6: Frontier intelligence that scales with your ambitionchecked 2026-10-15 | Tools: python tool |
Preference and Composite Rankings
| Test | Value | Printed by | Setup as printed |
|---|---|---|---|
| Anthropic ECI (AECI) | 164.49 | Anthropic, Claude Opus 5.5 System Cardchecked 2026-10-25 | - |
Price
API list prices in US dollars per one million tokens, as printed on the developer's pricing page on the day checked.
| Price | Value | Printed by | Setup as printed |
|---|---|---|---|
| Input | $10 | Anthropic, Anthropic API pricingchecked 2026-10-15 | - |
| Cached input | $1 | Anthropic, Anthropic API pricingchecked 2026-10-15 | - |
| Cache write | $12.5 | Anthropic, Anthropic API pricingchecked 2026-10-15 | Cache: 5 minute cache |
| Cache write, 1 hour | $20 | Anthropic, Anthropic API pricingchecked 2026-10-15 | - |
| Output | $50 | Anthropic, Anthropic API pricingchecked 2026-10-15 | - |
| Input, batch | $5 | Anthropic, Anthropic API pricingchecked 2026-10-15 | - |
| Output, batch | $25 | Anthropic, Anthropic API pricingchecked 2026-10-15 | - |
More from Anthropic
- Claude Haiku 5.5
- Claude Sonnet 5.5
- Claude Opus 5.5
- Claude Fable 5.1
- Claude Mythos 5.1
- Claude Opus 5
- Claude Sonnet 5
- Claude Fable 5
- Claude Opus 4.8
- Claude Opus 4.7
- Claude Mythos Preview
- Claude Sonnet 4.6
- Claude Opus 4.6
- Claude Opus 4.5
- Claude Haiku 4.5
- Claude Sonnet 4.5
- Claude Opus 4.1
- Claude Opus 4
- Claude Sonnet 4
- Claude 3.7 Sonnet
- Claude 3.5 Sonnet
Every number here is read from the same catalog file as the benchmark table, data version 2026103001. Where one page printed the model under several setups, each value is listed. The catalog is public in armanobosyan/sugra-llm-benchmarks; a wrong number can be reported from the table, with Report an error under the value, or as an issue in that repository.