Model
GPT-5.6 Terra
GPT-5.6 Terra is a model from OpenAI, released July 9, 2026. It ranks #19 of 44 models on the Vals Index with 53.09%. Its best result is #11 of 74 on Code Migration.
Release Date: Jul 9, 2026
Developer
OpenAI 🇺🇸
Context Window
1M
Max Output Tokens
128k
Token Costs (in/out)
$2.00/12.00
Weights
Private
Input Modalities
Accuracy
53.09 % ± 1.29
Cost / Test (Vals Index)
$
5.776
Latency
35 min 39 s
BenchmarksAccuracyRankings
Proprietary BenchmarksAcademic BenchmarksIndustry Partners
Compared with
GPT-5.6 Terra vs Claude Sonnet 5 29 shared benchmarks
GPT-5.6 Terra vs MiMo V2.6 Flash 19 shared benchmarks
GPT-5.6 Terra vs MiMo V2.6 Pro 19 shared benchmarks
GPT-5.6 Terra vs Gemini 3.7 Flash 27 shared benchmarks
GPT-5.6 Terra vs Grok 4.6 27 shared benchmarks
GPT-5.6 Terra vs Grok 4.7 20 shared benchmarks
GPT-5.6 Terra vs Muse Spark 1.3 14 shared benchmarks
GPT-5.6 Terra vs Claude Opus 4.8 24 shared benchmarks
GPT-5.6 Terra vs DeepSeek V4.1 Flash 22 shared benchmarks
GPT-5.6 Terra vs Claude Sonnet 5.5 19 shared benchmarks