Monthly signal
The standout launches, model drops, and platform moves worth tracking.
AI releases in September 2026
In September 2026, we tracked 213 releases from 26 companies. That is up 71 from August 2026 (142). Anthropic shipped the most (39), then Together AI (26) and OpenAI (25).
Releases
213
August 2026: 142
Companies shipping
26
August 2026: 20
Most shipped
Developer Tools
76 releases
Key launches in September 2026
- Model
Runway
Eleven v4 on Runway Dev
Eleven v4 (eleven_v4) is now available on Runway Dev. Generate expressive speech with audio tags like [laughs], [whispers], and [pause] in the script. Scripts can be up to 2,500 characters, using the same Runway preset voices as Eleven v3. Billed at 2.2 credits per 1,000 charact…
- Model
Microsoft Copilot
Availability of OpenAI's GPT-6.1 Sol and Claude Sonnet 5.5 in Microsoft Copilot
OpenAI's GPT-6.1 Sol and Claude Sonnet 5.5 are now available in Microsoft Copilot.
- Model
Google Gemini
Gemini 4 Argon
Gemini 4 Argon is a frontier-level AI model designed for complex workloads including software engineering, enterprise knowledge-based tasks, and cybersecurity defense. It features advanced reasoning capabilities, enterprise workflow support, and enhanced security features.
- Model
OpenAI
Released GPT-6.1 Sol (gpt-6.1-sol)
Released GPT-6.1 Sol (gpt-6.1-sol) for complex coding and professional work at a lower cost than GPT-6 Astra. Standard pricing per 1M tokens for prompts with up to 272K input tokens is $2 input, $0.10 cached input, $2.50 cache write, and $10 output. GPT-6.1 Sol also supports Mul…
- Model
OpenAI
GPT-6.1 Sol in Codex and ChatGPT Work
GPT-6.1 Sol offers near-Astra performance for complex work at a lower cost than Astra. Use gpt-6.1-sol; it is also the default model in the bundled catalog and Amazon Bedrock catalogs as of Codex CLI 0.159.1. Availability depends on plan, client and workspace settings.
- Model
Runway
ElevenLabs V4
ElevenLabs V4 is now supported in Runway, letting you generate audio with the latest, most expressive ElevenLabs model.
- Model
Mistral AI
Z.ai GLM 5.2 Deprecation
Z.ai GLM 5.2 ( zai-glm-5-2 ) is deprecated and retires on October 31, 2026. Use Z.ai GLM 5.3 ( zai-glm-5-3 ) instead, at the same price.
- Model
Mistral AI
OCR 4.0 Deprecation
OCR 4.0 ( mistral-ocr-4-0 ) is deprecated and retires on September 30, 2026. Use OCR 4.1 ( mistral-ocr-4-1 or mistral-ocr-latest ) instead, at the same price.
Who shipped most
Releases per company in September 2026. Each name opens that company's September 2026 changelog.
- AnthropicMostly Developer Tools39
- Together AIMostly Infrastructure26
- OpenAIMostly Developer Tools25
- RunwayMostly Model19
- KimiMostly Developer Tools11
- Microsoft CopilotMostly Product10
- Kilo CodeMostly Developer Tools9
- OllamaMostly Developer Tools9
- OpenCodeMostly Product9
- Mistral AIMostly Model8
- QwenMostly Developer Tools7
- WindsurfMostly Product6
Through the month
Releases by day of the month, across every company. A longer bar is a busier stretch.
- Days 1–729
- Days 8–1439
- Days 15–2145
- Days 22–2867
- Days 29–3033
By category
- Developer Tools76
- Product55
- Model38
- Infrastructure23
- API12
- Enterprise & Security5
Every AI release in September 2026
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.
- SDKs updates and deprecation of Claude Sonnet 4.5Claude Platform Release Notes
- SDK Beta Exits and Model DeprecationClaude Platform Release Notes
- Claude Sonnet 4.5 Deprecation and Sonnet 5.5 MigrationClaude Platform Release Notes
- Admin API updates for multiple SDKs and ant CLIClaude Platform Release Notes
- Admin API methods move out of betaClaude Platform Release Notes
- Admin API General AvailabilityClaude Platform Release Notes
- Claude Sonnet 5.5 launchClaude Help Center Release Notes
- Build plugins for ClaudeClaude Help Center Release Notes
- Qwen 27B Fine-tuning Context ExtensionTogether AI Changelog
- LoRA Rank Limit ImprovementTogether AI Changelog
- Higher LoRA rank limit for fine-tuningTogether AI Changelog
- Batch File Retention Policy UpdateTogether AI Changelog
- Registry Name Deployment SupportTogether AI Changelog
- Deploy a fine-tuned model by its registry nameTogether AI Changelog
- together/Tev1-4B-experimental Serverless ModelTogether AI Changelog
- Qwen Model Pricing UpdateTogether AI Changelog
- Ultrafast mode for GPT-6 AstraOpenAI API Changelog
- Released GPT-6.1 Sol (gpt-6.1-sol)OpenAI API Changelog
- GPT-6.1 Sol in Codex and ChatGPT WorkCodex Changelog
- Computer use in the Agents APIOpenAI API Changelog
- Codex CLI 0.159: instant interrupt and compact welcome screenCodex Changelog
- Agents API releaseOpenAI API Changelog
- Codex CLI 0.158: OAuth client secrets and transparent image backgroundsCodex Changelog
- Image encoding fix for GPT-6 Sol and GPT-6 LunaOpenAI API Changelog
- Eleven v4 on Runway DevRunway API Changelog
- ElevenLabs V4Runway Changelog
- Seedance 2.5 draft modeRunway API Changelog
- Runway MCP on CursorRunway Changelog
- DaVinci Resolve PluginRunway Changelog
- Brand Kits in Runway MCPRunway Changelog
- Kling Models on Runway MCPRunway Changelog
- Runway MCP for Grok BotRunway Changelog
- Kimi Code 2.1.1Kimi Code GitHub Releases
- Kimi Code 2.1.0Kimi Code GitHub Releases
- Kimi Code 2.0.2Kimi Code GitHub Releases
- Kimi Code 2.0.1Kimi Code GitHub Releases
- Kimi Code 2.0.0Kimi Code GitHub Releases
- Kimi Code 0.43.1Kimi Code GitHub Releases
- Kimi Code 0.43.0Kimi Code GitHub Releases
- Kimi Code 0.42.0Kimi Code GitHub Releases
- Introducing the plugin registry for Microsoft CopilotMicrosoft 365 Copilot Blog
- Availability of OpenAI's GPT-6.1 Sol and Claude Sonnet 5.5 in Microsoft CopilotMicrosoft 365 Copilot Blog
- Unlocking Deeper Copilot Insights with Enhanced Power BI FilteringMicrosoft 365 Copilot Release Notes
- See email attachments as pills in Copilot search resultsMicrosoft 365 Copilot Release Notes
- See Copilot usage in show changes paneMicrosoft 365 Copilot Release Notes
- Planner Agent chatMicrosoft 365 Copilot Release Notes
- New dedicated License Requests page in Microsoft 365 Admin CenterMicrosoft 365 Copilot Release Notes
- Navigate to your workbook changes directly from the Copilot chat pane responseMicrosoft 365 Copilot Release Notes
- v7.8.1 (release)Kilo-Org GitHub Releases
- JetBrains 7.1.8Kilo-Org GitHub Releases
- v7.7.9 (release)Kilo-Org GitHub Releases
- JetBrains 7.1.7Kilo-Org GitHub Releases
- v7.7.7 (release)Kilo-Org GitHub Releases
- v7.7.6 (release)Kilo-Org GitHub Releases
- v7.7.5 (release)Kilo-Org GitHub Releases
- Kilo Code v7.7.4 ReleaseKilo-Org GitHub Releases
- Ollama v0.35.1Ollama GitHub Releases
- Ollama now supports Jev-style decision modelsOllama Blog Feed
- Ollama v0.35.0Ollama GitHub Releases
- Ollama v0.34.4Ollama GitHub Releases
- Ollama v0.34.3Ollama GitHub Releases
- Ollama v0.34.2Ollama GitHub Releases
- Ollama v0.34.1Ollama GitHub Releases
- Ollama v0.34.0Ollama GitHub Releases
- OpenCode v1.18.34OpenCode Changelog
- OpenCode v1.18.33OpenCode Changelog
- OpenCode v1.18.32OpenCode Changelog
- OpenCode v1.18.31OpenCode Changelog
- OpenCode v1.18.30OpenCode Changelog
- OpenCode v1.18.29OpenCode Changelog
- OpenCode v1.18.28OpenCode Changelog
- v1.18.27OpenCode Changelog
- Z.ai GLM 5.2 DeprecationMistral Docs Changelog
- OCR 4.0 DeprecationMistral Docs Changelog
- Leanstral 1.5 DeprecationMistral Docs Changelog
- Z.ai GLM 5.3 General AvailabilityMistral Docs Changelog
- OCR API include_blocks UpdateMistral Docs Changelog
- OCR 4.1 GAMistral Docs Changelog
- Magistral Medium 1.2 and Magistral Small 1.2 ReleaseMistral Docs Changelog
- Pixtral and Mistral Small v24.09 ReleaseMistral Docs Changelog
16 more companies · 48 releases
- Qwen Code Desktop v0.24.7Qwen Code GitHub Releases
- Qwen Code Desktop v0.24.6Qwen Code GitHub Releases
- Qwen Code Desktop v0.24.5Qwen Code GitHub Releases
- Qwen Code Desktop v0.24.4Qwen Code GitHub Releases
- Qwen Code Desktop v0.24.3Qwen Code GitHub Releases
- Qwen Code Desktop v0.24.1Qwen Code GitHub Releases
- Qwen Code Desktop v0.24.0Qwen Code GitHub Releases
September 2026 AI releases FAQ
What AI models were released in September 2026?
Model releases we tracked in September 2026 include Released GPT-6.1 Sol (gpt-6.1-sol) from OpenAI (September 29, 2026), Claude Sonnet 5.5 launch from Anthropic (September 28, 2026), Magistral Medium 1.2 and Magistral Small 1.2 Release from Mistral AI (September 25, 2026), Pixtral and Mistral Small v24.09 Release from Mistral AI (September 24, 2026), Released GPT-6 Sol and GPT-6 Luna from OpenAI (September 22, 2026) and Claude Opus 5.5 Launch from Anthropic (September 22, 2026). Each one is listed below with a link to the official announcement.
Which AI company shipped the most in September 2026?
Anthropic shipped the most, with 39 releases, mostly Developer Tools. Together AI was next with 26.
How many AI releases were there in September 2026?
We tracked 213 releases from 26 companies in September 2026. A release is one announced change, so a major model launch and a small fix each count once.
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