Claude Haiku 3.5 vs DeepSeek V4.1 Flash 1017
DeepSeek V4.1 Flash 1017 comes out ahead, 79 to 46 on our weighted score, and it is the cheaper option too.
AnthropicClaude Haiku 3.5
46/100- ECI127.0
- Price$0.80 / $4.00
- Context200K
- Our pick
DeepSeekDeepSeek V4.1 Flash 1017
79/100- ECI158.8
- Price$0.15 / $0.60
- Context1M
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Make it a three-way comparison.
DeepSeek V4.1 Flash 1017 is our pick
DeepSeek V4.1 Flash 1017 is the better all-round choice, scoring 79/100 against Claude Haiku 3.5 (46). It leads on capability, price, inputs & features and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityDeepSeek V4.1 Flash 1017Capabilities Index (ECI): DeepSeek V4.1 Flash 1017 158.8 · Claude Haiku 3.5 127.0
- Lowest priceDeepSeek V4.1 Flash 1017DeepSeek V4.1 Flash 1017 $0.263 · Claude Haiku 3.5 $1.60 per 1M tokens (3:1 blend)
- Longest contextDeepSeek V4.1 Flash 1017DeepSeek V4.1 Flash 1017 1,000,000 · Claude Haiku 3.5 200,000 tokens
- Widest inputsClaude Haiku 3.5Claude Haiku 3.5: Text, Images, PDFs · DeepSeek V4.1 Flash 1017: Text, Images
- Self-hostingDeepSeek V4.1 Flash 1017Publishes downloadable weights (MIT)
| Measure | Weight | Claude Haiku 3.5 | DeepSeek V4.1 Flash 1017 |
|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 48 | 87 |
| Price | 25% | 38 | 74 |
| Inputs & features | 15% | 60 | 70 |
| Context window | 10% | 32 | 60 |
| Overall | 100% | 46/100 | 79/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Claude Haiku 3.5Anthropic | DeepSeek V4.1 Flash 1017DeepSeek |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | 127.0 | 158.8 (best) |
| ECI rank | #147 of 165 | #19 of 165 (best) |
| GPQA DiamondGraduate-level science questions | 38.1% | 93.2% (best) |
| FrontierMath Tiers 1–3Research-level mathematics | — | 71.2% |
| OTIS Mock AIME 2024–2025Competition mathematics | 4.3% | 99.4% (best) |
| SimpleQA VerifiedShort factual questions | — | 42.5% |
| Price per million tokens | ||
| Input | $0.80 | $0.15 (best) |
| Output | $4.00 | $0.60 (best) |
| Cached input | — | $0.003 |
| Blended (3:1) | $1.60 | $0.263 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 3 providers | Official DeepSeek API |
| Limits | ||
| Context window | 200,000 tokens | 1,000,000 tokens (best) |
| Max output | 8,192 tokens | 384,000 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | Yes | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | No | Yeslow · high · max |
| Tool calling | Yes | Yes |
| Structured output | No | Yes |
| Availability | ||
| Weights | Proprietary | OpenMIT |
| API model ID | — | deepseek-flash |
| API providers | 4 | 40 (best) |
| Released | Oct 22, 2024 | Oct 17, 2026 |
| Knowledge cutoff | Jul 31, 2024 | May 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Claude Haiku 3.5$16.00
- DeepSeek V4.1 Flash 1017$2.70
Which should you choose?
Which is better: Claude Haiku 3.5 or DeepSeek V4.1 Flash 1017?
DeepSeek V4.1 Flash 1017 is the better all-round choice, scoring 79/100 against Claude Haiku 3.5 (46). It leads on capability, price, inputs & features and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, Claude Haiku 3.5 or DeepSeek V4.1 Flash 1017?
DeepSeek V4.1 Flash 1017 is cheaper at $0.15 input / $0.60 output per million tokens (official DeepSeek API price). Claude Haiku 3.5 costs $0.80 input / $4.00 output per million tokens (median across 3 API providers). At a typical mix of three input tokens to one output token, that is $0.263 per million tokens for DeepSeek V4.1 Flash 1017 versus $1.60 for Claude Haiku 3.5 (6.1× as much).
Which scores higher on benchmarks?
DeepSeek V4.1 Flash 1017 scores higher on the Capabilities Index (ECI): DeepSeek V4.1 Flash 1017 158.8 (#19 of 165) and Claude Haiku 3.5 127.0 (#147 of 165). Their confidence ranges do not overlap (156.7–162.2 vs 121.4–129.2), so the gap is a real one. On individual benchmarks: GPQA Diamond — DeepSeek V4.1 Flash 1017 93.2%, Claude Haiku 3.5 38.1%; OTIS Mock AIME 2024–2025 — DeepSeek V4.1 Flash 1017 99.4%, Claude Haiku 3.5 4.3%.
Which is better for coding?
There are no published SWE-bench Verified results for Claude Haiku 3.5 and DeepSeek V4.1 Flash 1017 yet, so there is no like-for-like coding score. On overall capability, DeepSeek V4.1 Flash 1017 leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.
Which has the bigger context window?
DeepSeek V4.1 Flash 1017 has the largest context window at 1,000,000 tokens, against 200,000 for Claude Haiku 3.5. Maximum output per response: Claude Haiku 3.5 up to 8,192, DeepSeek V4.1 Flash 1017 up to 384,000 tokens.
Which can read images, PDFs, audio or video?
Claude Haiku 3.5 accepts text, images and PDFs; DeepSeek V4.1 Flash 1017 accepts text and images. Claude Haiku 3.5 handles the widest range of inputs.
Are any of these open source?
DeepSeek V4.1 Flash 1017 publishes its weights (MIT) and can be self-hosted; Claude Haiku 3.5 is proprietary.
Which is newer?
DeepSeek V4.1 Flash 1017 is the newest, released Oct 17, 2026. Claude Haiku 3.5 came out Oct 22, 2024. Knowledge cutoff: Claude Haiku 3.5 Jul 31, 2024, DeepSeek V4.1 Flash 1017 May 2025.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
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