Compare Models
GPT-5.6 Terra

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

56.53 % ± 1.24

Cost / Test (Vals Index)

$ 1.800

Latency

11 min 40 s

Vals Index
BenchmarksAccuracyRankings
Vals Index

0.0%

±1.24
12/46
Code Migration

0.0%

±4.01
15/49
EMB

0.0%

±3.04
6/46
Finance Agent (v2)

0.0%

±0.71
14/49
Legal Research Bench

0.0%

±3.42
10/49
MedCode

0.0%

±2.17
32/85
MedScribe

0.0%

±1.95
33/84
MortgageTax

0.0%

±0.93
25/95
ProofBench v1.1

0.0%

±4.54
6/23
SAGE

0.0%

±3.40
27/76
Public Benefits Bench v1.1

0.0%

±1.26
13/30
TaxEval v2

0.0%

±0.84
6/140
Vibe Code Bench v1.1

0.0%

±5.10
18/84
Harvey's Legal Agent Benchmark

0.0%

±0.00
34/50
GPQA Diamond

0.0%

±1.91
22/133
IOI

0.0%

±0.92
7/62
LiveCodeBench

0.0%

±1.02
25/138
LegalBench

0.0%

±0.45
20/137
MMLU Pro

0.0%

±0.33
37/133
MMMU

0.0%

±0.82
18/89
ProgramBench

0.0%

±0.50
8/39
SkillsBench

0.0%

±4.58
5/28
SWE-bench

0.0%

±1.93
39/83
Terminal-Bench 2.1

0.0%

±2.08
12/54
Proprietary BenchmarksAcademic BenchmarksIndustry Partners
Vals
Default Provider : OpenAI
Temperature: Default
Top P: Default
Top K: Default
Max Output Tokens: 128,000
Reasoning Effort: xhigh