# Claude Haiku 4.5 Thinking vs DeepSeek V3.1 (Reasoning)

> Side-by-side benchmark comparison for Claude Haiku 4.5 Thinking and DeepSeek V3.1 (Reasoning) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-haiku-4-5-thinking-vs-deepseek-v3-1-reasoning
- 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 Haiku 4.5 Thinking and DeepSeek V3.1 (Reasoning).

## Summary

- Claude Haiku 4.5 Thinking and DeepSeek V3.1 (Reasoning) 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 Thinking | DeepSeek V3.1 (Reasoning) |
|----------|----------|----------|
| Creator | Anthropic | DeepSeek |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 128K |
| Independent public score (not head-to-head) | null | 51.75 |
| Benchmarks Covered | 1 | 0 |
| Pricing (input/output) | N/A | $0.00 / $0.00 |

## Category Breakdown

### Coding

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- DeepSeek V3.1 (Reasoning) public-lane score: 50.3 (Estimated · #73/183)

| Benchmark | Claude Haiku 4.5 Thinking | DeepSeek V3.1 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 11.39% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- DeepSeek V3.1 (Reasoning) public-lane score: 61.8 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- DeepSeek V3.1 (Reasoning) public-lane score: 48.4 (Estimated · #101/181)

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- DeepSeek V3.1 (Reasoning) public-lane score: 48.3 (#81/120)

## FAQ

### Can I compare Claude Haiku 4.5 Thinking and DeepSeek V3.1 (Reasoning) 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 Thinking vs Claude Haiku 4.5](/compare/claude-haiku-4-5-vs-claude-haiku-4-5-thinking)
- [DeepSeek V3.1 (Reasoning) vs Claude Haiku 4.5](/compare/claude-haiku-4-5-vs-deepseek-v3-1-reasoning)
- [Claude Haiku 4.5 Thinking vs DeepSeek V3.1](/compare/claude-haiku-4-5-thinking-vs-deepseek-v3-1)
- [DeepSeek V3.1 (Reasoning) vs DeepSeek V3.1](/compare/deepseek-v3-1-vs-deepseek-v3-1-reasoning)

## Explore More

- [Claude Haiku 4.5 Thinking profile](/models/claude-haiku-4-5-thinking)
- [DeepSeek V3.1 (Reasoning) profile](/models/deepseek-v3-1-reasoning)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)