# Claude Haiku 4.5 vs Claude Mythos 5.2

> Side-by-side benchmark comparison for Claude Haiku 4.5 and Claude Mythos 5.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-haiku-4-5-vs-claude-mythos-5-2
- Last updated: November 10, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Claude Haiku 4.5 and Claude Mythos 5.2.

## Summary

- Claude Haiku 4.5 and Claude Mythos 5.2 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 Haiku 4.5 | Claude Mythos 5.2 |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 1M |
| Independent public score (not head-to-head) | 39.97 | null |
| Benchmarks Covered | 11 | 14 |
| Pricing (input/output) | $1.00 / $5.00 | $8.00 / $40.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 public-lane score: 23.4 (Supported · #114/132)
- Claude Mythos 5.2 public-lane score: Coming soon

| Benchmark | Claude Haiku 4.5 | Claude Mythos 5.2 | Winner |
|-----------|-----------|-----------|--------|
| JobBench | 16.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 43.8% | Coming soon | Coming soon |
| MazeBench | 0% | Coming soon | Coming soon |
| OSWorld 2.1 Offline | 15.7% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 70.50% | Coming soon |
| Terminal-Bench-Science 0.1 | Coming soon | 75.3% | Coming soon |
| CVE Rediscovery | Coming soon | 89.6% | Coming soon |
| ExploitGym | Coming soon | 38.1% | Coming soon |
| Binary Exploitation Benchmark | Coming soon | 148 | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 public-lane score: 18.5 (Supported · #141/158)
- Claude Mythos 5.2 public-lane score: Coming soon

| Benchmark | Claude Haiku 4.5 | Claude Mythos 5.2 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 73.3% | Coming soon | Coming soon |
| VulcanBench v3 | 76.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 41.2% | Coming soon | Coming soon |
| SWE-bench (Vals) | 66.6% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 public-lane score: Coming soon
- Claude Mythos 5.2 public-lane score: Coming soon

| Benchmark | Claude Haiku 4.5 | Claude Mythos 5.2 | Winner |
|-----------|-----------|-----------|--------|
| ParseBench | 49.34% | Coming soon | Coming soon |
| Biomedical image analysis | Coming soon | 80.7% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 public-lane score: 34.8 (Estimated · #138/179)
- Claude Mythos 5.2 public-lane score: Coming soon

| Benchmark | Claude Haiku 4.5 | Claude Mythos 5.2 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 72.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 78.7% | Coming soon | Coming soon |
| De novo protein-binder design | Coming soon | 85.1% | Coming soon |
| Protein Design | Coming soon | 64.6% | Coming soon |
| SingleCellBench | Coming soon | 65.6% | Coming soon |
| Protocols (troubleshooting) | Coming soon | 77.1% | Coming soon |
| Protein Domain ID | Coming soon | 91.8% | Coming soon |
| Protein Mutation Attribution | Coming soon | 51.5% | Coming soon |
| Morphology-to-molecule matching | Coming soon | 35.2% | Coming soon |
| Medicinal chemistry | Coming soon | 69.0% | Coming soon |

## FAQ

### Can I compare Claude Haiku 4.5 and Claude Mythos 5.2 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 Haiku 4.5 vs Claude Haiku 4.5 Thinking](/compare/claude-haiku-4-5-vs-claude-haiku-4-5-thinking)
- [Claude Mythos 5.2 vs Claude Haiku 4.5 Thinking](/compare/claude-haiku-4-5-thinking-vs-claude-mythos-5-2)
- [Claude Haiku 4.5 vs Claude Mythos 5](/compare/claude-haiku-4-5-vs-claude-mythos-5)
- [Claude Mythos 5.2 vs Claude Mythos 5](/compare/claude-mythos-5-vs-claude-mythos-5-2)

## Explore More

- [Claude Haiku 4.5 profile](/models/claude-haiku-4-5)
- [Claude Mythos 5.2 profile](/models/claude-mythos-5-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)