# Claude Mythos 5 vs Gemini 3 Flash

> Side-by-side benchmark comparison for Claude Mythos 5 and Gemini 3 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-mythos-5-vs-gemini-3-flash
- Last updated: September 4, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Claude Mythos 5 and Gemini 3 Flash.

## Summary

- Claude Mythos 5 and Gemini 3 Flash do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Claude Mythos 5 | Gemini 3 Flash |
|----------|----------|----------|
| Creator | Anthropic | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 1M+ | 1M |
| Independent public score (not head-to-head) | null | 62.96 |
| Benchmarks Covered | 15 | 11 |
| Pricing (input/output) | $10.00 / $50.00 | $0.50 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Mythos 5 public-lane score: Coming soon
- Gemini 3 Flash public-lane score: 28 (Supported · #139/151)

| Benchmark | Claude Mythos 5 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 88% | Coming soon | Coming soon |
| OSWorld-Verified | 85% | Coming soon | Coming soon |
| BrowseComp | 88% | Coming soon | Coming soon |
| CyberGym | 83.8% | Coming soon | Coming soon |
| Claw-Eval | Coming soon | 49.2% | Coming soon |
| Gert Labs | Coming soon | 56.63% | Coming soon |
| JobBench | Coming soon | 11.4% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 53.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Mythos 5 public-lane score: Coming soon
- Gemini 3 Flash public-lane score: 44.2 (Supported · #113/183)

| Benchmark | Claude Mythos 5 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 95.5% | Coming soon | Coming soon |
| SWE-bench Pro | 80.3% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 88.0% | Coming soon | Coming soon |
| Vibe Code Bench | Coming soon | 20.20% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.6% | Coming soon |
| SWE-bench (Vals) | Coming soon | 75.0% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Mythos 5 public-lane score: 85.1 (Unranked · 3 rankable rows)
- Gemini 3 Flash public-lane score: 75.8 (Unranked · 1 rankable row)

| Benchmark | Claude Mythos 5 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Multimodal | 54.9% | Coming soon | Coming soon |
| CharXiv | 93.5% | Coming soon | Coming soon |
| CharXiv w/o tools | 88.9% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Mythos 5 public-lane score: Coming soon
- Gemini 3 Flash public-lane score: 59.1 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Claude Mythos 5 public-lane score: Coming soon
- Gemini 3 Flash public-lane score: 57.8 (Supported · #47/181)

| Benchmark | Claude Mythos 5 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 94.1% | Coming soon | Coming soon |
| HLE | 64.5% | Coming soon | Coming soon |
| HLE w/o tools | 59% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 87.9% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 88.6% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Mythos 5 public-lane score: Coming soon
- Gemini 3 Flash public-lane score: 66 (#66/120)

### Multilingual

- Winner: Insufficient shared evidence
- Claude Mythos 5 public-lane score: Coming soon
- Gemini 3 Flash public-lane score: Coming soon

| Benchmark | Claude Mythos 5 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE Multilingual | 92.2% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Mythos 5 public-lane score: Coming soon
- Gemini 3 Flash public-lane score: 50.2 (Unranked · 2 rankable rows)

| Benchmark | Claude Mythos 5 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | 97.6% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 35.640% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 4.167% | Coming soon |

## FAQ

### Can I compare Claude Mythos 5 and Gemini 3 Flash on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Claude Mythos 5 vs Claude Mythos 5.1](/compare/claude-mythos-5-vs-claude-mythos-5-1)
- [Gemini 3 Flash vs Claude Mythos 5.1](/compare/claude-mythos-5-1-vs-gemini-3-flash)
- [Claude Mythos 5 vs Claude Mythos Preview](/compare/claude-mythos-5-vs-claude-mythos-preview)
- [Gemini 3 Flash vs Claude Mythos Preview](/compare/claude-mythos-preview-vs-gemini-3-flash)

## Explore More

- [Claude Mythos 5 profile](/models/claude-mythos-5)
- [Gemini 3 Flash profile](/models/gemini-3-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)