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GPT-5.6 Terra
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Tool use · Reasoning
Overview
Pricing
Evaluations
Evaluation overview
Overall rank
#18
88.9 points · 202 models
Coding rank
#16
87.9 points · 182 models
Data coverage
73 items
11 sources · updated through 2026-09-02
Domain performance
Coding
#16 / 182
87.9
Research
#23 / 196
92.3
Agents
#21 / 148
86.3
Vision
#19 / 82
83.4
Long context
#10 / 95
88.5
Evaluation highlights
All evaluations
Arena Text Rating
Reasoning · Arena.ai Text · xHigh mode
1,466.24Elo
34
/ 375
CharXiv(RQ)
Multimodal · Google Gemini 3.8 Flash Official Release Evaluation
85.9%
4
/ 44
Arena Agent Steerability
Agents · Arena.ai Agent · xHigh mode
9.6%
7
/ 52
Terminal Bench 2.1 (Terminus-2)
Coding · Google Gemini 3.8 Flash Official Release Evaluation
87.4%
5
/ 36
MRCR v2 (8-needle 128K)
Long context · Google Gemini 3.7 Flash Official Release Evaluation
93.5%
2
/ 13
CTF Challenge (Internal)
Cybersecurity · OpenAI GPT-5.6 Release
91.8%
2
/ 5
Basic information
Context (input / output)
1.05M / 128K
Release date
2026-07
Input modalities
Text · Image
Output modalities
Text
Family
GPT-5.6
Exact release date
2026-07-09
API model ID
gpt-5.6-terra
Availability
OpenAI
Full pricing
Input
$2 /1M
Output
$12 /1M
Related links
Official site
Version relationships
GPT-5.6 family
GPT-5.6 Luna
2026-07 · Same series
GPT-5.6 Sol
2026-07 · Same series
GPT-5.6 Terra
Current
2026-07 · Current model
Provider variants
xHigh / Codex Harness
Runtime modes
xHigh