GPT-5.6 Terra
by OpenAItext+image+file->text7 endpoints
Neura Intelligence Index
86.3/ 100
Rank
#20—
Confidence
mediumBenchmarks
7(18% coverage)
Overview
GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...
Capabilities
Text generation
Image understanding
Tool use / Function calling
Structured output
Extended reasoning
Prompt caching
Long context
File input
Deterministic seed
Modalities
Input
FileImageText
Output
Text
Technical Specifications
Context Window
1.1M tokens
Max Output
128K tokens
Knowledge Cutoff
2026-02-16
Tokenizer
GPT
Content Moderation
Enabled
Uptime (24h)
10000.0%
Country
🇺🇸US
Release Date
July 9, 20262mo
Supported Parameters
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools
Benchmark Performance
general
| Benchmark | Score | Source |
|---|---|---|
| MRCR v2 | 89.6 | verified |
coding
| Benchmark | Score | Source |
|---|---|---|
| SWE-Bench Pro | 63.4 | verified |
math
| Benchmark | Score | Source |
|---|---|---|
| FrontierMath | 84.9 | verified |
reasoning
| Benchmark | Score | Source |
|---|---|---|
| GPQA Diamond | 92.9 | verified |
multimodal
| Benchmark | Score | Source |
|---|---|---|
| MMMU-Pro | 80.7 | verified |
agent
| Benchmark | Score | Source |
|---|---|---|
| BrowseComp | 87.5 | verified |
| Toolathlon | 53.1 | verified |
Performance Over Time
Pricing
Per 1M tokens
Input$2.00
Output$12.00
Cache read$0.20
Cache write$2.50
Added
July 9, 2026
Last synced 9/16/2026