Mistral Medium 3.5
Mistral AIMULTIMODAL Open weight
- Provider
- Mistral AI
- Modality
- MULTIMODAL
- Parameters
- 128B
- Context window
- 256,000 tokens
- Weights
- Open
- Released
- 29 Apr 2026
Mistral Medium 3.5 is a 128B dense all-rounder that fuses instruct, reasoning and coding into one self-hostable model aimed at agentic workflows.
Best for
- Unified weights for instruct + reasoning + coding with tunable effort
- Tuned for agentic and coding workflows (ships a PR-opening coding agent)
- Cheaper to self-host than Large 3 (128B dense vs 675B MoE)
- Strong SWE-bench coding for its size
How it compares — and the India angle
- 128B dense self-hosts on a multi-GPU server — cheaper infra than the 675B Large 3.
- Cost-sensitive Indian users get better value from Small 4 or self-hosted Magistral.
- Strong agentic/SWE coding makes it a managed-API option for Indian dev teams without 675B infra.
Benchmarks
Representative public scores (approximate, higher is better) for relative comparison. Check the provider for the latest official results.
SWE-bench Verified78
How to access
API ~$1.50 / 1M input, ~$7.50 / 1M output. Open-weight (Modified MIT) — free to self-host.
Access Mistral Medium 3.5