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Claude Haiku 4.5 vs DeepSeek V4 Flash
Price, context window and capabilities side by side — read from the same catalog that meters your calls, not from a press release.
DeepSeek V4 Flash is 2.3x cheaper on input. DeepSeek V4 Flash is 3.8x cheaper on output. Claude Haiku 4.5 holds 200K tokens against 128K.
At a glance
Side by side
Anthropic
Fast, cheap frontier-family model for high-volume tasks.
DeepSeek
The V4 family's speed tier, near-V4 quality on everyday calls at the lowest price in the family.
Retired. Use DeepSeek V4.1 Flash instead — same endpoint, same key.
Specifications
Every difference we can measure
| Claude Haiku 4.5 | DeepSeek V4 Flash | |
|---|---|---|
| Input price | $1/M | $0.44/M |
| Output price | $5/M | $1.32/M |
| Context window | 200K tokens | 128K tokens |
| Tool calling | Yes | Yes |
| Prompt caching | Yes | No |
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.
Keep looking
Related comparisons
FAQ
Frequently asked questions
What is the difference between Claude Haiku 4.5 and DeepSeek V4 Flash?
DeepSeek V4 Flash is 2.3x cheaper on input. DeepSeek V4 Flash is 3.8x cheaper on output. Claude Haiku 4.5 holds 200K tokens against 128K. Only Claude Haiku 4.5 declares prompt caching. 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 4.5 or DeepSeek V4 Flash?
DeepSeek V4 Flash 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 4.5 and DeepSeek V4 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 4.5 and DeepSeek V4 Flash on the same key and compare them on your own prompts. Free starter credits included, no subscription required.