Monthly signal
The standout launches, model drops, and platform moves worth tracking.
In April 2026, we tracked 80 releases from 14 companies. That is down 84 from March 2026 (164). Kilo Code shipped the most (24), then Anthropic (12) and Google Gemini (11).
Releases
80
March 2026: 164
Companies shipping
14
March 2026: 30
Most shipped
Developer Tools
42 releases
Mistral AI
We released Mistral Medium 3.5 ( mistral-medium-3-5 ), our frontier-class multimodal model optimized for agentic and coding use cases, with adjustable reasoning via the reasoning_effort parameter. Released as open weights under a Modified MIT license.
OpenAI
Released GPT-5.5 , a new frontier model for complex professional work, to the Chat Completions and Responses API, and released GPT-5.5 Pro for Responses API requests for tougher problems that benefit from more compute. GPT-5.5 supports a 1M token context window, image input, str…
Mistral AI
Released open-mixtral-8x22b (aka open-mixtral-8x22b-2404).
xAI
You can now use grok-voice-think-fast-1.0 with the Speech to Speech API. To get started, check out the Speech to Speech docs. For more details, see our blog post .
OpenAI
GPT-5.5 is now available in Codex as OpenAI’s newest frontier model for complex coding, computer use, knowledge work, and research workflows. GPT-5.5 in Codex GPT-5.5 is the recommended choice for most Codex tasks when it appears in your model picker.
Anthropic
Claude Opus 4.7 launch with improvements in software engineering and vision capabilities
Runway
Use anything-text, image, video or audio-to generate or edit videos with Seedance 2.0. Now available on Unlimited and Enterprise plans outside the US.
Anthropic
Claude Mythos Preview is available as a gated, invitation-only research preview for defensive cybersecurity work as part of Project Glasswing.
Releases per company in April 2026. Each name opens that company's April 2026 changelog.
Releases by day of the month, across every company. A longer bar is a busier stretch.
Grouped by company, busiest first, with each company's latest releases. Titles open the entry on the company's month page; source links go to the official announcement.
Model releases we tracked in April 2026 include Mistral Medium 3.5 Release from Mistral AI (April 28, 2026), open-mixtral-8x22b Release from Mistral AI (April 24, 2026) and Claude Opus 4.7 launch from Anthropic (April 16, 2026). Each one is listed below with a link to the official announcement.
Kilo Code shipped the most, with 24 releases, mostly Developer Tools. Anthropic was next with 12.
We tracked 80 releases from 14 companies in April 2026. A release is one announced change, so a major model launch and a small fix each count once.
Newsletter
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The standout launches, model drops, and platform moves worth tracking.
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Monthly dispatch
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