Claude Haiku 4.5 vs Mistral Small 4
Facts only. This page does not pick a winner. For a picked winner, see the use case comparison on Tools.
| Claude Haiku 4.5 | Mistral Small 4 | |
|---|---|---|
| API model IDs | claude-haiku-4-5-20251001, claude-haiku-4-5 | mistral-small-2603 |
| Context window | 200,000 | 256,000 |
| Lifecycle | active | active |
| License | proprietary | open-weights |
| Trains on API data | No | Yes |
| Zero data retention | on-request | on-request |
| Input per 1M tokens | $1 (verified 2026-09-08) | $0.15 (verified 2026-09-08) |
Frequently asked questions
- Which has the larger context window, Claude Haiku 4.5 or Mistral Small 4?
- Claude Haiku 4.5 holds 200,000 tokens and Mistral Small 4 holds 256,000. Mistral Small 4 holds more. The context window counts the prompt, any attached files, and the reply together.
- Which is cheaper, Claude Haiku 4.5 or Mistral Small 4?
- Per million input tokens, Claude Haiku 4.5 was $1 (verified 2026-09-08) and Mistral Small 4 was $0.15 (verified 2026-09-08). Mistral Small 4 is cheaper per input token. Output tokens cost $5 and $0.6 respectively, and output volume usually decides the bill.
- Does Claude Haiku 4.5 or Mistral Small 4 train on API data?
- Claude Haiku 4.5 does not train on API data by default, and Mistral Small 4 trains on API data by default. Zero data retention is on-request for Claude Haiku 4.5 and on-request for Mistral Small 4. Verified 2026-09-08 and 2026-09-08 against the providers' own documentation.
- Is Claude Haiku 4.5 or Mistral Small 4 being retired?
- Claude Haiku 4.5 is active. Mistral Small 4 is active. Lifecycle checked 2026-09-08 and 2026-09-08. Pin a dated snapshot ID rather than an alias if a retirement would break you.