Model comparison
Claude Mythos 5 vs Gemini 3.6 Flash
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); Gemini 3.6 Flash unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Mythos 5 and Gemini 3.6 Flash share 1 comparable benchmark result. 1 of 8 categories are comparable. 14 results are unique to Claude Mythos 5; 18 to Gemini 3.6 Flash.
Updated July 21, 2026- Shared results
- 1
- Claude Mythos 5 only
- 14
- Gemini 3.6 Flash only
- 18
- Comparable categories
- 1 / 8
Treat this as a split decision. Claude Mythos 5 makes more sense if agentic is the priority or you need the larger 1M+ context window; Gemini 3.6 Flash is the better fit if you want the cheaper token bill.
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 and Gemini 3.6 Flash finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
Claude Mythos 5 is also the more expensive model on tokens at $10.00 input / $50.00 output per 1M tokens, versus $1.50 input / $7.50 output per 1M tokens for Gemini 3.6 Flash. That is roughly 6.7x on output cost alone. Claude Mythos 5 gives you the larger context window at 1M+, compared with 1M for Gemini 3.6 Flash.
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 | Gemini 3.6 Flash |
|---|---|---|---|
| Agentic | Claude Mythos 587.0 | Margin← 4.0 | Gemini 3.6 Flash83.0 |
| Coding | Claude Mythos 589.7 | MarginNo overlap | Gemini 3.6 FlashNot measured |
| Knowledge | Claude Mythos 568.5 | MarginNo overlap | Gemini 3.6 FlashNot measured |
| Math | Claude Mythos 597.6 | MarginNo overlap | Gemini 3.6 FlashNot measured |
| Multimodal | Claude Mythos 593.5 | MarginNo overlap | Gemini 3.6 FlashNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
OSWorld-Verified
AgenticA 85%B 83%Winner: Claude Mythos 5Δ 2OSWorld-Verified: Claude Mythos 5 scored 85%; Gemini 3.6 Flash scored 83%. 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 | Gemini 3.6 Flash | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Mythos 5$10 input / $50 output | Gemini 3.6 Flash$1.5 input / $7.5 output | Gemini 3.6 Flash has the lower combined listed price. |
| Generation speedtokens per second | Claude Mythos 5Not available | Gemini 3.6 FlashNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Mythos 5Not available | Gemini 3.6 FlashNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Mythos 51M+ | Gemini 3.6 Flash1M | Claude Mythos 5 lists the larger context window. |
Benchmark Deep Dive
AgenticClaude Mythos 5 wins10 benchmarks
| Benchmark | Claude Mythos 5 | Gemini 3.6 Flash | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 88% | — | Not comparable |
| OSWorld-VerifiedSource | 85% | 83% | Claude Mythos 5 leads |
| BrowseCompSource | 88% | — | Not comparable |
| ExploitGymSource | 17.5% | — | Not comparable |
| GDPval-AASource | — | 1421 | Not comparable |
| AA Agentic IndexSource | — | 38.7% | Not comparable |
| GDPval-AASource | — | 46.1% | Not comparable |
| AA BriefcaseSource | — | 961 | Not comparable |
| AA Tau3 BankingSource | — | 24.5% | Not comparable |
| aaTerminalBench21Source | — | 77.5% | Not comparable |
Coding6 benchmarks
Reasoning2 benchmarks
Knowledge9 benchmarks
| Benchmark | Claude Mythos 5 | Gemini 3.6 Flash | Result |
|---|---|---|---|
| GPQASource | 94.1% | — | Not comparable |
| HLESource | 64.5% | — | Not comparable |
| HLE w/o toolsSource | 59% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 50.1% | Not comparable |
| AA-GPQA DiamondSource | — | 92.8% | Not comparable |
| AA-HLESource | — | 38.3% | Not comparable |
| AA-Omniscience IndexSource | — | 23.5% | Not comparable |
| AA-Omniscience AccuracySource | — | 50.2% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 53.5% | Not comparable |
Math1 benchmarks
| Benchmark | Claude Mythos 5 | Gemini 3.6 Flash | Result |
|---|---|---|---|
| USAMO 2026Source | 97.6% | — | Not comparable |
Multilingual1 benchmarks
| Benchmark | Claude Mythos 5 | Gemini 3.6 Flash | Result |
|---|---|---|---|
| SWE MultilingualSource | 92.2% | — | Not comparable |
Frequently Asked Questions (2)
Which is better, Claude Mythos 5 or Gemini 3.6 Flash?
Claude Mythos 5 and Gemini 3.6 Flash are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for agentic tasks, Claude Mythos 5 or Gemini 3.6 Flash?
Claude Mythos 5 has the edge for agentic tasks in this comparison, averaging 87 versus 83. Inside this category, OSWorld-Verified is the benchmark that creates the most daylight between them.
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