Model comparison
Claude Mythos 5 vs o1-pro
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 #2 (Supported); o1-pro #148 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Mythos 5 and o1-pro share 1 comparable benchmark result. 1 of 8 categories are comparable. 14 results are unique to Claude Mythos 5; 1 to o1-pro.
Updated July 24, 2026- Shared results
- 1
- Claude Mythos 5 only
- 14
- o1-pro only
- 1
- Comparable categories
- 1 / 8
Pick Claude Mythos 5 if you want the stronger benchmark profile. o1-pro 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; 1 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, 83.01 to 45.03. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
o1-pro is also the more expensive model on tokens at $150.00 input / $600.00 output per 1M tokens, versus $10.00 input / $50.00 output per 1M tokens for Claude Mythos 5. That is roughly 12.0x on output cost alone. Claude Mythos 5 gives you the larger context window at 1M+, compared with 200K for o1-pro.
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-pro |
|---|---|---|---|
| Knowledge | Claude Mythos 568.5 | Margin→ 10.5 | o1-pro79.0 |
| Agentic | Claude Mythos 587.0 | MarginNo overlap | o1-proNot measured |
| Coding | Claude Mythos 589.7 | MarginNo overlap | o1-proNot measured |
| Math | Claude Mythos 597.6 | MarginNo overlap | o1-proNot measured |
| Multimodal | Claude Mythos 593.5 | MarginNo overlap | o1-proNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
GPQA
KnowledgeA 94.1%B 79%Winner: Claude Mythos 5Δ 15.1GPQA: Claude Mythos 5 scored 94.1%; o1-pro scored 79%. 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-pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Mythos 5$10 input / $50 output | o1-pro$150 input / $600 output | Claude Mythos 5 has the lower combined listed price. |
| Generation speedtokens per second | Claude Mythos 5Not available | o1-proNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Mythos 5Not available | o1-proNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Mythos 51M+ | o1-pro200K | Claude Mythos 5 lists the larger context window. |
Benchmark Deep Dive
Frequently Asked Questions (2)
Which is better, Claude Mythos 5 or o1-pro?
Claude Mythos 5 is ahead on BenchLM's BenchAlign leaderboard, 83.01 to 45.03. The biggest single separator in this matchup is GPQA, where the scores are 94.1% and 79%.
Which is better for knowledge tasks, Claude Mythos 5 or o1-pro?
o1-pro has the edge for knowledge tasks in this comparison, averaging 79 versus 68.5. Inside this category, GPQA is the benchmark that creates the most daylight between them.