GPT-5.6 Luna
GPT-5.6 Luna is now the default ChatGPT model for Free and Go users, with unlimited text chats and a higher-reasoning Think option subject to abuse guardrails.
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Why this model scores 80.8
Capability, autonomy, misuse, and control difficulty remain unchanged. Deployment rises from 98 to 99 because OpenAI made Luna the default for Free and Go users and announced unlimited text chats at a service it says reaches one billion people weekly, subject to abuse guardrails and non-text limits.
Videos about GPT-5.6 Luna
Reviewed videos from Artificial Intelligence Videos. These links add context and never change a DoomBench score.
News tied to GPT-5.6 Luna
The model score of 80.8 rates this model's risk profile. The overall Doom Index of 67.9 measures the complete temporally weighted evidence record. These values answer different questions.
Each article's current Doom Index contribution is divided equally among the exact models named on that article. This prevents multi-model evidence from being claimed in full on several model pages. Model risk scores use a bounded temporal offset around their technical profile, but never feed back into the overall index.
AWS deploys GPT-5.6 Terra and Luna to US government cloud regions
AWS made GPT-5.6 Terra and Luna generally available through Amazon Bedrock in both AWS GovCloud regions. AWS explicitly positions the models for autonomous coding agents, long-horizon genomics and biology analysis, advanced cybersecurity research, and million-token agent histories.
- Full item contribution
- +0.14
- GPT-5.6 Luna equal share
- +0.07
OpenAI reports 82% lower successful coding-agent task cost for GPT-5.6 Terra in Kiro
OpenAI and AWS testing found GPT-5.6 Terra completed successful Terminal-Bench 2.1 coding-agent tasks at roughly 82% lower cost in Kiro. The deployment also exposes Sol, Terra, and Luna for specification-driven implementation, multi-step coding, review checkpoints, and property-based testing.
- Full item contribution
- +0.12
- GPT-5.6 Luna equal share
- +0.04
OpenAI makes GPT-5.6 Luna the free ChatGPT default with unlimited text
OpenAI made GPT-5.6 Luna the default for Free and Go users and announced unlimited text chats, while updating GPT-5.6 Sol for Plus and Pro users; OpenAI says ChatGPT serves one billion people weekly.
- Full item contribution
- +0.09
- GPT-5.6 Luna equal share
- +0.05
OpenAI uses GPT-Red to harden GPT-5.6 against prompt injection
OpenAI published GPT-Red, a self-improving automated red-team model, and separately documented its use in evaluating and training deployed GPT-5.6 safeguards against direct and agentic prompt injection.
- Full item contribution
- -0.11
- GPT-5.6 Luna equal share
- -0.03
OpenAI launches GPT-5.6 across ChatGPT, Codex, and the API
The GPT-5.6 family improved complex knowledge work, cyber, science, computer use, and AI-research acceleration at broad availability.
- Full item contribution
- +0.23
- GPT-5.6 Luna equal share
- +0.08
Model score history
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R7
Doom Score 80.8
Exact-version evidence chronology replayed after run doombench-hourly-news-20260825-050010 under temporal-monthly-pressure-v4.
25 Aug 2026 -
R6
Doom Score 80.7
Source-backed model availability audit using the model's existing primary or authoritative catalogue evidence. Exact-version evidence chronology replayed under temporal-monthly-pressure-v4.
12 Aug 2026 -
R5
Doom Score 80.7
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-142416 under temporal-monthly-pressure-v4.
12 Aug 2026 -
R4
Doom Score 79.9
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-132112 under fixed-sensitivity-v3.
12 Aug 2026 -
R3
Doom Score 77.5
Full-corpus evidence recalculated after run intensive-backfill-20260811-191225 under bounded-corpus-v2.
11 Aug 2026 -
R2
Doom Score 80.7
OpenAI's dated rollout made GPT-5.6 Luna the Free and Go default with unlimited text chats, supporting a deployment revision from 98 to 99.
11 Aug 2026 -
R1
Doom Score 80.6
Initial source-backed model assessment
11 Aug 2026