# Claude Mythos 5 vs LFM3-1.7B

> Side-by-side benchmark comparison for Claude Mythos 5 and LFM3-1.7B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-mythos-5-vs-lfm3-1-7b
- Last updated: October 27, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Claude Mythos 5 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Claude Mythos 5 has the higher overall point estimate 85 to 22.99. Conditional score ranges do not establish rank confidence.
- The biggest single benchmark swing is Terminal-Bench 2.1 in Agentic, with scores of 88.0% and 12.9%.
- LFM3-1.7B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Mythos 5 also has the larger context window at 1M+.

## Model Snapshot

| Property | Claude Mythos 5 | LFM3-1.7B |
|----------|----------|----------|
| Creator | Anthropic | LiquidAI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M+ | 256K |
| Overall Score | null | 22.99 |
| Benchmarks Covered | 15 | 24 |
| Pricing (input/output) | $10.00 / $50.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Mythos 5 public-lane score: Coming soon
- LFM3-1.7B public-lane score: 14.4 (Estimated · #123/134)

| Benchmark | Claude Mythos 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.0% | 12.9% | Claude Mythos 5 |
| OSWorld-Verified | 85% | Coming soon | Coming soon |
| BrowseComp | 88% | Coming soon | Coming soon |
| CyberGym | 83.8% | Coming soon | Coming soon |
| AutomationBench | Coming soon | 41.3% | Coming soon |
| BFCL v4 | Coming soon | 71.4% | Coming soon |
| τ³-bench results | Coming soon | 68.0% | Coming soon |
| WebArena-Verified | Coming soon | 38.4% | Coming soon |
| MCP Atlas | Coming soon | 32.6% | Coming soon |
| ToolSandbox | Coming soon | 80.36% | Coming soon |
| Claw-Eval | Coming soon | 68.6% | Coming soon |
| HLE w/ tools | Coming soon | 13.9% | Coming soon |
| LiveClaw | Coming soon | 45.60% | Coming soon |

### Coding

- Winner: Not comparable
- Claude Mythos 5 public-lane score: Coming soon
- LFM3-1.7B public-lane score: 13 (Estimated · #142/155)

| Benchmark | Claude Mythos 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 95.5% | 43.4% | Claude Mythos 5 |
| SWE-bench Pro | 80.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 88.0% | 12.9% | Claude Mythos 5 |
| SciCode | Coming soon | 28.5% | Coming soon |
| SWE Multilingual | Coming soon | 23% | Coming soon |
| LiveCodeBench v6 | Coming soon | 73.5% | Coming soon |
| LiveCodeBench Pro | Coming soon | 31.7% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Mythos 5 public-lane score: Coming soon
- LFM3-1.7B public-lane score: 61.3 (Unranked · 1 rankable row)

| Benchmark | Claude Mythos 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| RULER (128K) | Coming soon | 65.56% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Mythos 5 public-lane score: 91.1 (Unranked · 3 rankable rows)
- LFM3-1.7B public-lane score: Coming soon

| Benchmark | Claude Mythos 5 | LFM3-1.7B | 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 |

### Knowledge

- Winner: Not comparable
- Claude Mythos 5 public-lane score: Coming soon
- LFM3-1.7B public-lane score: 25.5 (Estimated · #175/189)

| Benchmark | Claude Mythos 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 94.1% | 63.4% | Claude Mythos 5 |
| HLE | 64.5% | 7.2% | Claude Mythos 5 |
| HLE w/o tools | 59% | Coming soon | Coming soon |
| GPQA-D | Coming soon | 63.4% | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude Mythos 5 public-lane score: Coming soon
- LFM3-1.7B public-lane score: Coming soon

| Benchmark | Claude Mythos 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| SWE Multilingual | 92.2% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Mythos 5 public-lane score: Coming soon
- LFM3-1.7B public-lane score: 71.7 (#76/156)

| Benchmark | Claude Mythos 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 96.7% | Coming soon |
| IFBench | Coming soon | 73.0% | Coming soon |
| Multi-IF | Coming soon | 89.10% | Coming soon |
| IFStruct | Coming soon | 93.72% | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Mythos 5 public-lane score: Coming soon
- LFM3-1.7B public-lane score: Coming soon

| Benchmark | Claude Mythos 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | 97.6% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Mythos 5 or LFM3-1.7B?

Claude Mythos 5 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### How many benchmarks does Claude Mythos 5 cover on BenchLM?

Claude Mythos 5 currently has 15 sourced benchmark scores on BenchLM.

### How many benchmarks does LFM3-1.7B cover on BenchLM?

LFM3-1.7B currently has 24 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Mythos 5 vs Claude Mythos 5.1](/compare/claude-mythos-5-vs-claude-mythos-5-1)
- [LFM3-1.7B vs Claude Mythos 5.1](/compare/claude-mythos-5-1-vs-lfm3-1-7b)
- [Claude Mythos 5 vs Claude Mythos Preview](/compare/claude-mythos-5-vs-claude-mythos-preview)
- [LFM3-1.7B vs Claude Mythos Preview](/compare/claude-mythos-preview-vs-lfm3-1-7b)

## Explore More

- [Claude Mythos 5 profile](/models/claude-mythos-5)
- [LFM3-1.7B profile](/models/lfm3-1-7b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)