Compare / Models
Claude Haiku 4.5 vs GPT-4.1 mini
Price, context window and capabilities side by side, read from the same catalog that meters your calls, not from a press release.
GPT-4.1 mini is 2.5x cheaper on input. GPT-4.1 mini is 3.1x cheaper on output. GPT-4.1 mini holds 1M tokens against 200K.
At a glance
Side by side
Anthropic
Fast, cheap frontier-family model for high-volume tasks.
OpenAI
OpenAI's April 2025 small model with a million-token window, still running inside a lot of production agents. Keep it as your baseline and test newer models against it on the same key.
Specifications
Every difference we can measure
| Claude Haiku 4.5 | GPT-4.1 mini | |
|---|---|---|
| Input price | $1/M | $0.4/M |
| Output price | $5/M | $1.6/M |
| Context window | 200K tokens | 1M tokens |
| Vision | No | Yes |
| Tool calling | Yes | Yes |
| Prompt caching | Yes | Yes |
| Long context | No | 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.
Verdict
Which to pick
Claude Haiku 4.5 costs more per token ($1 input and $5 output per million) and has a 200k window against GPT-4.1 mini's million. Teams usually weigh it when following instructions and calling tools reliably matters more than the price per token. Test both on your own conversations; the rate card is only half the answer.
Keep looking
Related comparisons
FAQ
Frequently asked questions
What is the difference between Claude Haiku 4.5 and GPT-4.1 mini?
GPT-4.1 mini is 2.5x cheaper on input. GPT-4.1 mini is 3.1x cheaper on output. GPT-4.1 mini holds 1M tokens against 200K. Only GPT-4.1 mini declares vision. Only GPT-4.1 mini declares long context. 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 GPT-4.1 mini?
GPT-4.1 mini 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 GPT-4.1 mini 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 GPT-4.1 mini on the same key and compare them on your own prompts. Free starter credits included, no subscription required.