Mistral Small 4

Mistral Small 4 represents the next major release in the Mistral Small family, designed as a unified system that consolidates capabilities from several flagship Mistral models into a single architecture. It brings together strong reasoning drawn from Magistral, multimodal understanding inherited from Pixtral, and agentic coding capabilities developed for Devstral, enabling one model to handle complex analysis, software development, and visual tasks within the same workflow. This consolidation approach positions it as a versatile general-purpose model rather than a specialized tool for any single domain.

Listed in Mistral's official model catalog and published as an open-weights release on Hugging Face under the repository name Mistral-Small-4-119B-2603, Mistral Small 4 is intended for practitioners who need flexibility across reasoning-heavy, coding, and multimodal scenarios without switching between separate models. Its design philosophy emphasizes practical versatility for developers building agentic systems, conducting detailed analysis, or working with mixed text-and-image inputs. The open-weights availability further broadens its practical fit, allowing deployment in environments where model transparency and self-hosting are priorities.

Pioneermistralai/Mistral-Small-4-119B-2603mistral-small

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Quick Info

Provider: Pioneer
Model key: mistralai/Mistral-Small-4-119B-2603
Release date: Mar 16, 2026
Last updated: Mar 16, 2026
Knowledge cutoff: 2025-06
Input modalities
Output modalities
Capabilities

Cost

Input token cost: $0.15
Output token cost: $0.60

Limits

Output tokens: 32,000 tokens
Context window: 32,000 tokens

Transparent token rates

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Rates are shown per one million tokens. Combined means one million input plus one million output tokens.

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Latest news about Mistral Small 4

Pioneer

Coverage

Mozilla has announced a partnership with Mistral AI to expand the AI capabilities of Firefox, integrating the Mistral Small 4 model (distributed at the Hugging Face repo mistralai/Mistral-Small-4-119B-2603) into Firefox's "Smart Window" feature. According to the Mozilla and Mistral announcement pages cited in the repor The partnership makes Mistral Small 4 an opt-in AI model choice inside Smart Window, where users can have the assistant analyze tab content, group tabs automatically, chat, and perform AI-powered web searches. Mistral Small 4 is an open-weights model released under the Apache License 2.0, making it suitable for Mozilla

Pioneer

CoverageBenchmark

The OpenRouter listing for mistral-small-2603 (Mistral Small 4) confirms a release date of March 16, 2026 and presents the model as unifying capabilities drawn from Magistral (reasoning), Pixtral (multimodal understanding), and Devstral (agentic coding) into one system. The page lists modalities as text plus image inpu The page also frames Mistral Small 4 as a gateway-routed model, with providers on OpenRouter including Mistral, Mistral (ZDR), Mistral (EU), and Venice, each carrying their own latency, throughput, uptime, and effective pricing columns. Because this content is presented through a routing/aggregator surface rather than