Anthropic Claude Haiku 5.5 vs DeepSeek V4.1 Flash
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- Both cost about the same at a typical 3:1 input/output mix.
- Both accept prompts up to 1M tokens.
- DeepSeek V4.1 Flash output costs $0.18 per 1M via Decart, against the list price of $0.42.
- Claude Haiku 5.5 is rated 187 points higher on the chess arena.
| Claude Haiku 5.5 | DeepSeek V4.1 Flash | |
|---|---|---|
| Vendor | Anthropic | DeepSeek |
| Released | 2026-10-07 | 2026-09-10 |
| Input / 1M | $0.10 | $0.14 |
| Output / 1M | $0.50 | $0.42 |
| Cached input / 1M | $0.01 | $0.0042 |
| Blended / 1M (3:1) | $0.20 | $0.21 |
| Context | 1M | 1M |
| Max output | 128K | 131K |
| Accepts | text, image, file | text, image |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 10 | 41 |
| Cheapest provider, output | $0.50 | $0.18 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | 1655 ±84 | 1468 ±79 |
| Vendor API status | Operational | Operational |
Cost calculator
Claude Haiku 5.5
$13.50 per month$0.45 per day
DeepSeek V4.1 Flash
$14.70 per month$0.49 per day
Claude Haiku 5.5 saves $1.20 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
Compare Claude Haiku 5.5 with
Compare DeepSeek V4.1 Flash with