Claude Haiku 5.5 vs DeepSeek V4.1 Flash: pricing and benchmarks
Claude Haiku 5.5 is 67% cheaper on input tokens ($0.10 vs $0.30 per 1M). Claude Haiku 5.5 is 58% cheaper on output tokens ($0.50 vs $1.20 per 1M). On our document Q&A workload (50,000 questions a month), Claude Haiku 5.5 costs $55.00 a month versus $156.00 for DeepSeek V4.1 Flash, 65% less. Roughly tied. Claude Haiku 5.5 scores 159.0 and DeepSeek V4.1 Flash scores 155.6 on the Epoch Capabilities Index, and their confidence intervals overlap.
Prices verified October 17, 2026.
Which should you choose?
Roughly tied. Claude Haiku 5.5 scores 159.0 and DeepSeek V4.1 Flash scores 155.6 on the Epoch Capabilities Index, and their confidence intervals overlap.
Claude Haiku 5.5 scores 75.1% on FrontierMath (Tiers 1–3) vs 67.4% for DeepSeek V4.1 Flash.
Claude Haiku 5.5 costs $0.20 per 1M tokens (3:1 input-to-output mix) vs $0.525 for DeepSeek V4.1 Flash, 62% less.
Claude Haiku 5.5 delivers equal or higher overall capability for 62% less.
Pricing and specs
| Claude Haiku 5.5 | DeepSeek V4.1 Flash | |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| API model ID | claude-haiku-5-5 | deepseek-flash |
| Input / 1M tokens | $0.10 | $0.30 |
| Cached input / 1M tokens | $0.01 | $0.006 |
| Output / 1M tokens | $0.50 | $1.20 |
| Long-context rates | $0.50 in / $2.50 out above 100K prompt tokens | — |
| Context window | 1M tokens | 1M tokens |
| Max output | 128K tokens | 384K tokens |
| Batch discount | 50% off | — |
Benchmarks
| Claude Haiku 5.5 | DeepSeek V4.1 Flash | |
|---|---|---|
| Epoch Capabilities Index | 159.0 | 155.6 |
| GPQA Diamond· Science reasoning | 89.6% | 89.8% |
| FrontierMath (Tiers 1–3)· Advanced math | 75.1% | 67.4% |
| SimpleQA Verified· Factual accuracy | 23.8% | 42.9% |
| ARC-AGI-2· Abstract reasoning | — | 72.9% |
| DeepSWE· Coding | — | — |
| APEX-Agents· Agentic work | 56.1% | 39.5% |
Source: Epoch AI, best recorded result per model (CC BY 4.0). A dash means no published score. See all benchmarks
Monthly cost for real workloads
| Workload | Claude Haiku 5.5 | DeepSeek V4.1 Flash | Difference |
|---|---|---|---|
Support chatbot 100,000 replies a month, ~1,500 input tokens (system prompt + history) and ~400 output tokens each. | $35.00 | $93.00 | Claude Haiku 5.5 62% cheaper |
Document Q&A (RAG) 50,000 questions a month with ~8,000 tokens of retrieved context and ~600 output tokens each. | $55.00 | $156.00 | Claude Haiku 5.5 65% cheaper |
Coding agent 10,000 agent steps a month, ~40,000 input tokens each (70% read from the prompt cache) and ~2,000 output tokens. | $24.80 | $61.68 | Claude Haiku 5.5 60% cheaper |
Estimates use standard list prices and ignore cache-write surcharges. Different tokenizers can count the same text differently, so test with your own prompts.
Claude Haiku 5.5 vs DeepSeek V4.1 Flash cost calculator
- $55.00/mo$0.0011 / request
- DeepSeek V4.1 FlashDeepSeek$156.00/mo$0.0031 / request
Standard-tier list prices. Long-context rates apply automatically where the provider publishes a threshold. Excludes cache-write surcharges, taxes, batch and volume discounts.
Claude Haiku 5.5 pricing notes
Anthropic’s fastest, lowest-cost model, priced by prompt length, with a 1M-token context window.
- Prompts over 100K tokens, counting cache reads and writes, are billed at $0.50 input / $2.50 output per 1M tokens.
- Cache writes cost $0.125 (5-minute cache) or $0.20 (1-hour cache) per 1M tokens, 5x that above 100K tokens.
- US-only inference (inference_geo: "us") costs 1.1x.
DeepSeek V4.1 Flash pricing notes
DeepSeek’s low-cost model with thinking and non-thinking modes, tool calls and vision input.
- Prices shown are peak rates. Off-peak rates are half: peak hours are 01:00–04:00 and 06:00–10:00 UTC, Monday to Friday.
- Compatible with both OpenAI-format and Anthropic-format APIs.
- Web Search and Fetch cost $0.75 per 1,000 successful requests each; calls made through Claude Code, Codex or DeepSeek Harness are free until November 1, 2026.
Frequently asked questions
- Is Claude Haiku 5.5 cheaper than DeepSeek V4.1 Flash?
- Claude Haiku 5.5 is 67% cheaper on input tokens ($0.10 vs $0.30 per 1M). Claude Haiku 5.5 is 58% cheaper on output tokens ($0.50 vs $1.20 per 1M). On our document Q&A workload (50,000 questions a month), Claude Haiku 5.5 costs $55.00 a month versus $156.00 for DeepSeek V4.1 Flash, 65% less.
- Which is more capable, Claude Haiku 5.5 or DeepSeek V4.1 Flash?
- Roughly tied. Claude Haiku 5.5 scores 159.0 and DeepSeek V4.1 Flash scores 155.6 on the Epoch Capabilities Index, and their confidence intervals overlap.
- How much does Claude Haiku 5.5 cost per 1M tokens?
- Claude Haiku 5.5 costs $0.10 per 1M input tokens and $0.50 per 1M output tokens, and $0.01 per 1M cached input tokens on Anthropic’s standard tier.
- How much does DeepSeek V4.1 Flash cost per 1M tokens?
- DeepSeek V4.1 Flash costs $0.30 per 1M input tokens and $1.20 per 1M output tokens, and $0.006 per 1M cached input tokens on DeepSeek’s standard tier.
- Which has the larger context window, Claude Haiku 5.5 or DeepSeek V4.1 Flash?
- Both offer a 1M-token context window.