Claude Haiku 5.5 vs DeepSeek V4.1 Flash
Price and specs side by side · USD per 1M tokens · verified 2026-10-23
// side by side
| metric | Claude Haiku 5.5 | DeepSeek V4.1 Flash |
|---|
| input / 1M | $0.10 | $0.20 |
| output / 1M | $0.50 | $0.60 |
| blended (3:1) | $0.20 | $0.30 |
| cache read / 1M | $0.01 | $0.006 |
| context | 1M | 1.05M |
| max output | 128K | 384K |
| input types | text · image · pdf | text · image |
| reasoning | yes | yes |
| tool calling | yes | yes |
| structured output | yes | yes |
| open weights | no | yes |
| released | 2026-10-07 | 2026-09-10 |
| knowledge cutoff | 2026-06 | 2025-05 |
| lab | Anthropic | DeepSeek |
// monthly cost scenarios
| workload | tokens in / out | Claude Haiku 5.5 | DeepSeek V4.1 Flash |
|---|
| Chatbot | 10M / 2M | $2.00 | $3.20 |
| RAG app | 50M / 5M | $7.50 | $13.00 |
| Coding agent | 20M / 10M | $7.00 | $10.00 |
// verdict
- Claude Haiku 5.5 is 33.3% cheaper than DeepSeek V4.1 Flash on a blended 3:1 input/output basis.
- DeepSeek V4.1 Flash has the larger context window (1.05M vs 1M tokens).
- Chatbot (10M input / 2M output tokens per month): Claude Haiku 5.5 costs $2.00 vs $3.20 for DeepSeek V4.1 Flash, saving $1.20 per month.
- RAG app (50M input / 5M output tokens per month): Claude Haiku 5.5 costs $7.50 vs $13.00 for DeepSeek V4.1 Flash, saving $5.50 per month.
- Coding agent (20M input / 10M output tokens per month): Claude Haiku 5.5 costs $7.00 vs $10.00 for DeepSeek V4.1 Flash, saving $3.00 per month.
// Claude Haiku 5.5 or DeepSeek V4.1 Flash: which one to choose
- Choose Claude Haiku 5.5 for cost-sensitive, high-volume workloads.
- Choose DeepSeek V4.1 Flash for long documents and large codebases (1.05M-token context).
- Choose DeepSeek V4.1 Flash if you want open weights you can self-host.