- IBM released the Granite 4.1 series — available in 3B, 8B, and 30B parameter variants — as open-source models with 131K-token context windows, specifically engineered for enterprise workloads including document understanding, code generation, and retrieval-augmented generation.
- The release reinforces IBM's strategy of providing commercially licensed, open-weight models for regulated industries where deploying proprietary cloud APIs raises data residency, compliance, and audit-trail concerns.
Snapshot — April 29, 2026
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- Mistral AI released Mistral Medium 3.5 on April 29 as an open-source model with a 256K-token context window, targeting the mid-tier enterprise segment that needs extended-context reasoning at lower cost than frontier closed-source alternatives.
- Mistral's continued open-source strategy — while Alibaba and other Chinese players close their weights — positions the French lab as the primary Western open-weight option for organizations requiring model transparency and self-hosting capability.