mistralai/mistral-medium-3-5Mistral Medium 3.5 is Mistral AI’s open-weights AI model, released Apr 28, 2026. It costs $1.50/M input and $7.50/M output tokens, and handles a 262K-token context window. Its strongest use case is agentic & tools, where it ranks in the 75th percentile of the models Model Beat tracks.
Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI.
Scores on standardized evaluations. Higher is better — and rank shows where Mistral Medium 3.5 lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Novel ML problem-solving
Scientific research coding
Human-rated web development
Tool-agent-user reliability
Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI.
Mistral Medium 3.5 is an AI model developed by Mistral AI, part of the Mistral family, released Apr 28, 2026.
Mistral Medium 3.5's list price from Mistral AI is $1.50 per million input tokens and $7.50 per million output tokens.
Mistral Medium 3.5 supports a context window of up to 262K tokens.
On standardized evaluations tracked by Epoch AI, Mistral Medium 3.5 scores 94.2% on τ²-bench, 40.2% on SciCode, 43.7% on WeirdML.
Mistral Medium 3.5 is released with open weights (Open weights (restricted use)), so the model can be downloaded and self-hosted.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 10, 2026.