GPT-5.6 Terra
A balanced GPT-5.6 tier designed to make strong agentic and professional capability practical across high-volume use.
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Why this model scores 86.9
Lower peak capability than Sol is offset by exceptionally broad and economical deployment, increasing exposure across automated workflows.
News tied to GPT-5.6 Terra
The model score of 86.9 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 Terra 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 Terra equal share
- +0.04
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 Terra 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 Terra equal share
- +0.08
Model score history
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R6
Doom Score 86.9
Exact-version evidence chronology replayed after run doombench-hourly-news-20260825-050010 under temporal-monthly-pressure-v4.
25 Aug 2026 -
R5
Doom Score 86.8
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 -
R4
Doom Score 86.8
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-142416 under temporal-monthly-pressure-v4.
12 Aug 2026 -
R3
Doom Score 86.1
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-132112 under fixed-sensitivity-v3.
12 Aug 2026 -
R2
Doom Score 83.7
Full-corpus evidence recalculated after run intensive-backfill-20260811-191225 under bounded-corpus-v2.
11 Aug 2026 -
R1
Doom Score 86.8
Initial source-backed model assessment
11 Aug 2026