Last refreshed 2026-06-19. Next refresh: weekly.
Why use Mistral Medium 3.5 on OpenRouter?
OpenRouter offers Mistral Medium 3.5 with pay-as-you-go pricing at $1.50/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare Mistral Medium 3.5 across 3 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: mistralai/mistral-medium-3-5mistralai/mistral-medium-3-5Request example
mistralai/mistral-medium-3-5.Gotchas
- Use provider model ID "mistralai/mistral-medium-3-5", not the LLMReference slug "mistral-medium-3.5".
Compare Mistral Medium 3.5 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Mistral AI Studio | $1.50 | $7.50 |
| OpenRouter | $1.50 | $7.50 |
| Vercel AI Gateway | $1.50 | $7.50 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $1.50 |
| Output tokens | $7.50 |
| Image input | $1.00 |
Capabilities
About Mistral Medium 3.5
Mistral's 128B flagship merged model, released April 29, 2026. Open weights available on HuggingFace since ~May 22, 2026 under a Modified MIT License (free for companies with <$20M/month revenue). Dense 128B architecture with 256k context window, configurable reasoning effort, vision encoder for variable image sizes, and native function calling. Achieves 91.4% on τ³-Telecom and 77.6% on SWE-Bench Verified. Strong multilingual support across 24+ languages. Replaces Mistral Medium 3.1, Magistral, and Devstral 2 as Mistral's primary merged model. Available via Mistral API at $1.50/$7.50 per million tokens (input/output) and via NVIDIA NIM/endpoints.
FAQ
What does Mistral Medium 3.5 cost on OpenRouter?
On OpenRouter, Mistral Medium 3.5 costs $1.5 per 1M input tokens and $7.5 per 1M output tokens.
What is the context window for Mistral Medium 3.5 on OpenRouter?
Mistral Medium 3.5 supports a 262k token context window on OpenRouter.
How does OpenRouter compare to other Mistral Medium 3.5 providers?
Mistral Medium 3.5 is available from 3 providers. The cheapest input pricing is $1.50/1M tokens from Mistral AI Studio.
What API model ID do I use for Mistral Medium 3.5 on OpenRouter?
Use the model ID mistralai/mistral-medium-3-5 when calling OpenRouter's API.
Who created Mistral Medium 3.5?
Mistral Medium 3.5 was created by MistralAI as part of the Mistral Medium model family.
Is Mistral Medium 3.5 open source?
Mistral Medium 3.5 has open weights under Mistral Modified MIT License according to the seed data, but that does not necessarily mean an OSI-approved open-source license.