Claude Haiku 5.5 vs DeepSeek-V4.1-Flash-1017
| Spec | Claude Haiku 5.5 | DeepSeek-V4.1-Flash-1017 |
|---|---|---|
| Respan Index | 57.2 (#16) | 59.4 (#15) |
| Blended price per 1M | $0.1 | $0.074 |
| Context window | 1M | 1M |
| Input / output per 1M | $0.05 / $0.25 | $0.035 / $0.192 |
| Max output | 128K | - |
| Input | text, vision | text, image |
| Released | 2026-10-07 | 2026-10-17 |
Respan Index by category
Each category is scored 0 to 100, and how far ahead the winner is. Leads under a point are close to even.
| Category | Claude Haiku 5.5 | DeepSeek-V4.1-Flash-1017 |
|---|---|---|
| Coding | 55.0 Claude Haiku 5.5 | 47.7 DeepSeek-V4.1-Flash-1017 |
| Agents | 65.9 Claude Haiku 5.5 | 76.8 DeepSeek-V4.1-Flash-1017 |
| Reasoning | 65.0 Claude Haiku 5.5 | 61.5 DeepSeek-V4.1-Flash-1017 |
| Knowledge & language | 23.6 Claude Haiku 5.5 | 42.6 DeepSeek-V4.1-Flash-1017 |
| Human preference | 55.5 Claude Haiku 5.5 | 57.6* DeepSeek-V4.1-Flash-1017 |
* Estimated: no published scores in that category. How the Respan Index works
Benchmarks both report
DeepSeek-V4.1-Flash-1017 leads on 6 of the 11 benchmarks both report. Higher is better. Each score links to where it was published.
| Benchmark | Claude Haiku 5.5 | DeepSeek-V4.1-Flash-1017 |
|---|---|---|
| APEX-Agents (Mercor) | 56.1% | 69.8% |
| Chess Puzzles (Epoch AI) | 55% | 46% |
| Terminal-Bench 4.0 (Vals AI) | 36.4% | 31.8% |
| FrontierMath Tier 4 v2 (Epoch AI) | 46.3% | 46.3% |
| FrontierMath Tiers 1-3 v2 (Epoch AI) | 75.1% | 71.2% |
| GPQA Diamond | 89.6% | 93.2% |
| Mystery Game Puzzles (Epoch AI) | 30% | 49% |
| OTIS Mock AIME 2024-2025 (Epoch AI) | 98.9% | 99.4% |
| SimpleQA Verified | 23.8% | 42.5% |
| Humanity's Last Exam (no tools) | 45.9% | 42.6% |
| Terminal-Bench 4.0 | 39.2% | 42.3% |
FAQ
Is Claude Haiku 5.5 better than DeepSeek-V4.1-Flash-1017?
DeepSeek-V4.1-Flash-1017 scores 59.4 on the Respan Index (#15), ahead of Claude Haiku 5.5 at 57.2 (#16). DeepSeek-V4.1-Flash-1017 leads on 6 of the 11 benchmarks both report.
Which is cheaper, Claude Haiku 5.5 or DeepSeek-V4.1-Flash-1017?
Claude Haiku 5.5 lists at $0.05 input and $0.25 output per 1M tokens; DeepSeek-V4.1-Flash-1017 at $0.035 and $0.192. DeepSeek-V4.1-Flash-1017 is 1.3x cheaper per token at list price.
Which has the larger context window?
Both accept 1M tokens of context.
Compare other models
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