GPT-5.6
Model ● Covered in 49 stories + Follow
GPT-5.6 is an OpenAI language model that has been updated with improved safety and accuracy, including enhanced filtering and reported benchmarks showing fewer unsafe responses versus a previous version. In recent coverage, GPT-5.6 has also been deployed via products and tooling such as Kiro and the LLM command-line tool (with GPT-5.6 models set as the default), and OpenAI introduced an “Ultrafast” preview mode for GPT-5.6 Sol aimed at increasing completion speed. Coverage also points to developer-focused guidance for building agents with GPT-5.6, highlighting Responses API-related capabilities.
Updated 13 September 2026
Specifications
No specifications recorded yet.
Latest developments
Datasette 1.0a39 and 0.65.4 security releases
Simon Willison’s Weblog · 6 days ago ·
19
OpenAI’s GPT-6 Astra aces South Korea’s CSAT across all subjects
The Korea Times · 1 week ago ·
24
Advancing price-performance for developers with GPT‑5.6 in Kiro
OpenAI · 3 weeks ago ·
40
ChatGPT search now uses the site:operator at scale
Simon Willison’s Weblog · 3 weeks ago ·
12
OpenAI introduces ‘Ultrafast,’ a new mode that makes GPT-5.6 Sol work at 14x the speed
TechCrunch · 1 month ago ·
33
IBM partners with OpenAI to bolster enterprise AI push
TechCrunch · 1 month ago ·
7
The builder’s guide to GPT‑5.6
OpenAI · 1 month ago ·
17
2026
OpenAI previews an 'Ultrafast' API tier for GPT-5.6 Sol, targeting up to 14× faster responses Feature update
Simon Willison releases LLM 0.32 with reasoning traces, server-side tools, and streaming events API Feature update
Major tech companies implement AI token spending controls and shift focus to efficiency over consumption Policy change
OpenAI releases improved GPT-5.6 models and expands free ChatGPT access with unlimited text chats Feature update
OpenAI's Astra model solves ten long-standing open problems in mathematics and theoretical computer science Research publication
Microsoft, Amazon, and OpenAI report strong AI-driven financial results with significant capital investments Benchmark result
OpenAI releases GPT-5.6 model family with efficiency improvements and significant price reductions Model release
Multiple AI model releases and regulatory developments across OpenAI, Anthropic, and competitors Other
Moonshot AI released Kimi K3, an open-weight large language model Model release
OpenAI releases GPT-Red, an automated red-teaming system for identifying vulnerabilities in language models Product launch
OpenAI's Codex reaches 8 million users following GPT-5.6 launch, experiencing rapid growth and scaling challenges Product launch
OpenAI releases GPT-5.6 family of models (Sol, Terra, Luna) with general availability on Amazon Bedrock Model release
Microsoft replaces external AI models with internal alternatives in Office applications to reduce inference costs Feature update
OpenAI releases GPT-5.6 model family with three tiers (Luna, Terra, Sol) and new multi-agent capabilities Model release
xAI launches Grok 4.5, an Opus-class large language model developed in partnership with Cursor Model release
OpenAI releases GPT-5.6 model family with improved efficiency and reasoning capabilities Model release
OpenAI releases GPT-5.6 in multiple variants alongside frontier AI model releases from competitors Model release
Multiple AI labs release new model variants and agent capabilities Model release
OpenAI releases GPT-5.6 with staggered rollout following Trump administration request for limited initial access Model release
- Apple's Siri AI Can Be Swapped Out for Claude, ChatGPT, Code Shows
- Datasette 1.0a39 and 0.65.4 security releases
- OpenAI’s GPT-6 Astra aces South Korea’s CSAT across all subjects
- Advancing price-performance for developers with GPT‑5.6 in Kiro
- ChatGPT search now uses the site:operator at scale
- OpenAI introduces ‘Ultrafast,’ a new mode that makes GPT-5.6 Sol work at 14x the speed
- IBM partners with OpenAI to bolster enterprise AI push
- The builder’s guide to GPT‑5.6
- OpenAI Updates GPT-5.6 with Improved Safety and Accuracy
- New release of LLM adds support for reasoning traces, OpenAI Responses, server-side tools, and smarter logging
- OpenAI’s Astra just proved 10 long-standing math and science theorems. The tokens cost $2,000.
- Microsoft Tells Engineers ‘Tokenmaxxing Is Not What We Are Optimizing For’
- [AINews] GPT 5.6 price cut by 20%-80%: Cost of GPT 5.4 Intelligence dropped 13x in 4 months due to GPT 5.6 recursive self-optimization
- Chinese AI competitors may have forced OpenAI’s hand on pricing
- How GPT-5.6 fuses frontier intelligence with frontier efficiency
- OpenAI CFO Sarah Friar tells employees that annualized revenue in July topped all of Q2
- Advancing the price-performance frontier with GPT-5.6
- How enabling two settings tripled our scores on the ARC-AGI-3 benchmark
- GPT-5.6 kernel of truth: Sol can cut its own costs, says OpenAI
- How GPT-5.6 fuses frontier intelligence with frontier efficiency
- Microsoft is racing to make OpenAI optional
- LWiAI Podcast #252 - GPT 5.6, Grok 4.5, Nemotron-Labs-Diffusion, AI 2040
- Moonshot is Chinese But Its AI Models Are From Another Planet
- Controlling Reasoning Effort in LLMs
- OpenAI Details GPT-Red: An Internal Automated Red-Teaming Model That Beat Human Red-Teamers 84% To 13% On Prompt Injection
- Quoting Thibault Sottiaux
- OpenAI’s GPT-Red automates prompt injection testing to harden AI agents
- Meet GPT-Red: an LLM super-hacker OpenAI built to make its models safer
- OpenAI hits 8 million Codex users — what developers need to know
- How to use GPT-5.6
- Toyo brings AI-powered email and Slack triaging with meeting prep and follow-up management
- Microsoft routes some Excel and Outlook prompts to internal models to cut inference costs
- The Sequence Radar #893: Last Week in AI: GPT-5.6, Grok 4.5, Muse Spark 1.1 and the Post-Chatbot Stack
- [AINews] not much happened today
- GPT-5.6: Frontier intelligence that scales with your ambition
- [AINews] OpenAI launches GPT 5.6 Sol/Terra/Luna, Codex becomes ChatGPT superapp
- OpenAI's big launch — and bigger departure
- OpenAI GPT-5.6: AI Could Do Anything, Then It Met ARC-AGI-3
- Grok x Cursor
- GPT-5.6 is now the preferred model in Microsoft 365 Copilot
- GPT-5.6: Frontier intelligence that scales with your ambition
- GPT-5.6 Is Last in 5.x Line, GPT-6 Coming in About a Month
- OpenAI's GPT-5.6 Clears Commerce Department Testing, Sol/Terra/Luna Launch Thursday
- What The New 100x Agentic Engineer Looks Like In The Era Of Fable & GPT 5.6
- GPT-5.6 is here but...
- The Sequence Radar #885: Last Week in AI: Models, Games, and the Future of Evaluation
- The AI Industry as You Know It Died Today
- Trump Administration Asks OpenAI to Stagger AI Model Release
- Five things I learned from a conversation with Microsoft CEO Satya Nadella
Relationships
Products & technology
- OpenAI develops this model · 30 sources
- Microsoft deploys this model · 2 sources
- Derived from GPT-5.6 Sol · 1 source
- Derived from Luna · 1 source
- Derived from Terra · 1 source
- Derived from Sol · 1 source
- Integrated with Amazon · 1 source
- Integrated with Responses API · 1 source
- Microsoft 365 Copilot integrated with this model · 1 source
- GPT-5.6 Luna derived from this model · 1 source
- GPT-5.6 Terra derived from this model · 1 source
- GPT-5.6 Sol derived from this model · 1 source