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Claude Haiku 5.5 vs DeepSeek V4.1 Flash
Price, context window and capabilities side by side, read from the same catalog that meters your calls, not from a press release.
Claude Haiku 5.5 is 3.0x cheaper on input. Claude Haiku 5.5 is 2.4x cheaper on output. Only Claude Haiku 5.5 declares vision.
At a glance
Side by side
Anthropic
Anthropic's cheapest and fastest Claude: a big step up from Haiku 4.5 in coding, computer use and knowledge work, at $0.10 / $0.50 per 1M tokens for prompts up to 100K.
DeepSeek
DeepSeek's cheapest current model, a million-token window at flash rates.
Specifications
Every difference we can measure
| Claude Haiku 5.5 | DeepSeek V4.1 Flash | |
|---|---|---|
| Input price | $0.1/M | $0.3/M |
| Output price | $0.5/M | $1.2/M |
| Context window | 1M tokens | 1M tokens |
| Vision | Yes | No |
| Tool calling | Yes | Yes |
| Prompt caching | Yes | Yes |
| Long context | Yes | Yes |
A row appears only when we hold the fact for both models. Anything the provider has not published is left out rather than guessed, so an empty row is missing data and never a zero.
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FAQ
Frequently asked questions
What is the difference between Claude Haiku 5.5 and DeepSeek V4.1 Flash?
Claude Haiku 5.5 is 3.0x cheaper on input. Claude Haiku 5.5 is 2.4x cheaper on output. Only Claude Haiku 5.5 declares vision. Both run on the same endpoint and the same key here, so trying each is a one-line change to the model id.
Which is cheaper, Claude Haiku 5.5 or DeepSeek V4.1 Flash?
Claude Haiku 5.5 is, on input tokens. Output usually dominates the bill on generative work, so check the output row above against your own ratio of prompt to completion before deciding.
Can I switch between Claude Haiku 5.5 and DeepSeek V4.1 Flash without changing my code?
Yes. Both are OpenAI-compatible through one CompanyFabric key, so switching is the model string and nothing else, no second SDK, no second contract, one prepaid balance across both.
Do I have to choose?
No. Send companyfabric/auto and we route each request to the cheapest model that can serve it, which is how most people use both without deciding in advance.
One key. Every model. Exact prices.
Run Claude Haiku 5.5 and DeepSeek V4.1 Flash on the same key and compare them on your own prompts. Free starter credits included, no subscription required.