Model comparison
Claude Mythos 5 vs o1
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Mythos 5 #1 (Supported); o1 #129 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Mythos 5 and o1 share 1 comparable benchmark result. 2 of 8 categories are comparable. 14 results are unique to Claude Mythos 5; 15 to o1.
Updated July 23, 2026- Shared results
- 1
- Claude Mythos 5 only
- 14
- o1 only
- 15
- Comparable categories
- 2 / 8
Pick Claude Mythos 5 if you want the stronger benchmark profile. o1 only becomes the better choice if knowledge is the priority.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 2 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude Mythos 5 is clearly ahead on the BenchAlign aggregate, 83.93 to 48.1. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Mythos 5's sharpest advantage is in mathematics, where it averages 97.6 against 9.3. The single biggest benchmark swing on the page is GPQA, 94.1% to 75.7%. o1 does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.
o1 is also the more expensive model on tokens at $15.00 input / $60.00 output per 1M tokens, versus $10.00 input / $50.00 output per 1M tokens for Claude Mythos 5. Claude Mythos 5 gives you the larger context window at 1M+, compared with 200K for o1.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Mythos 5 | Δ | o1 |
|---|---|---|---|
| Math | Claude Mythos 597.6 | Margin← 88.3 | o19.3 |
| Knowledge | Claude Mythos 568.5 | Margin→ 7.2 | o175.7 |
| Agentic | Claude Mythos 587.0 | MarginNo overlap | o1Not measured |
| Coding | Claude Mythos 589.7 | MarginNo overlap | o1Not measured |
| Multimodal | Claude Mythos 593.5 | MarginNo overlap | o1Not measured |
| Inst. Following | Claude Mythos 5Not measured | MarginNo overlap | o192.2 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
GPQA
KnowledgeA 94.1%B 75.7%Winner: Claude Mythos 5Δ 18.4GPQA: Claude Mythos 5 scored 94.1%; o1 scored 75.7%. Claude Mythos 5 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Mythos 5 | o1 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Mythos 5$10 input / $50 output | o1$15 input / $60 output | Claude Mythos 5 has the lower combined listed price. |
| Generation speedtokens per second | Claude Mythos 5Not available | o198 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Mythos 5Not available | o132.29 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Mythos 51M+ | o1200K | Claude Mythos 5 lists the larger context window. |
Benchmark Deep Dive
Agentic5 benchmarks
Coding5 benchmarks
Reasoning2 benchmarks
Knowledgeo1 wins10 benchmarks
| Benchmark | Claude Mythos 5 | o1 | Result |
|---|---|---|---|
| GPQASource | 94.1% | 75.7% | Claude Mythos 5 leads |
| HLESource | 64.5% | — | Not comparable |
| HLE w/o toolsSource | 59% | — | Not comparable |
| MMLUSource | — | 91.8% | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 23.4% | Not comparable |
| AA-GPQA DiamondSource | — | 74.7% | Not comparable |
| AA-HLESource | — | 7.7% | Not comparable |
| AA-Omniscience IndexSource | — | -10.5% | Not comparable |
| AA-Omniscience AccuracySource | — | 34.7% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 69.3% | Not comparable |
MathClaude Mythos 5 wins2 benchmarks
Multilingual1 benchmarks
| Benchmark | Claude Mythos 5 | o1 | Result |
|---|---|---|---|
| SWE MultilingualSource | 92.2% | — | Not comparable |
Multimodal3 benchmarks
Frequently Asked Questions (3)
Which is better, Claude Mythos 5 or o1?
Claude Mythos 5 is ahead on BenchLM's BenchAlign leaderboard, 83.93 to 48.1. The biggest single separator in this matchup is GPQA, where the scores are 94.1% and 75.7%.
Which is better for knowledge tasks, Claude Mythos 5 or o1?
o1 has the edge for knowledge tasks in this comparison, averaging 75.7 versus 68.5. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Which is better for math, Claude Mythos 5 or o1?
Claude Mythos 5 has the edge for math in this comparison, averaging 97.6 versus 9.3. o1 stays close enough that the answer can still flip depending on your workload.
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