gpt-5.6-terra
OpenAIdevelopers.openai.com/api/docs/models/gpt-5.6-te
GPT-5.6 model that balances intelligence and cost
Updated 10 h ago · first seen 11 Sept 2026
model_01M293V76WTDQGBAGZGC12SS2B
Overview
Identity
Identity block not returned by the API for this entity.
Openness
Openness not classified yet — no sourced evidence to place this model in the ontology.
Key facts
- Release date
Source:OpenRouter public model & pricing listingT2observed 12 h agomedium
- Knowledge cutoff
Source:OpenAI Platform docsT1observed 12 h agohigh
- Official page
Source:OpenAI Platform docsT1observed 12 h agohigh
- API model id
Source:OpenAI Platform docsT1observed 12 h agohigh
- Openrouter id
Source:OpenRouter public model & pricing listingT2observed 12 h agomedium
Architecture
- Tokenizer
Source:OpenRouter public model & pricing listingT2observed 12 h agomedium
Capabilities
Modalities
- Modalities
- imagetext
- Input
- textimage
- Output
- text
Capabilities
Tool calling
Yes
OpenAI Platform docs · T1
Structured output
Yes
OpenAI Platform docs · T1
Reasoning
Yes
OpenRouter public model & pricing listing · T2
Vision
Yes
OpenAI Platform docs · T1
Audio
Unavailable
Fine-tuning available
No
OpenAI Platform docs · T1
- Context window
Source:OpenAI Platform docsT1observed 12 h agohigh
- Max output
Source:OpenAI Platform docsT1observed 12 h agohigh
- Knowledge cutoff
Source:OpenAI Platform docsT1observed 12 h agohigh
- Tokenizer
Source:OpenRouter public model & pricing listingT2observed 12 h agomedium
Benchmarks18
Compare with another model →Comparable same task and conditions · Partially comparable same task, conditions differ (effort, temperature, judge) · Not comparable different variant or metric
No benchmark results recorded
Providers & Pricing3
All offers in the price terminal →USD per 1M tokens as published by each provider (USD). Rows are append-only: every change is kept in the history below.
Price history
Output price · USD / 1M tokens 1 provider
- OpenAI API
- OpenAI API$12 → $611 Sept 2026
- OpenAI APIfirst observed $1211 Sept 2026
Input price · USD / 1M tokens 1 provider
- OpenAI API
- OpenAI API$2 → $111 Sept 2026
- OpenAI APIfirst observed $211 Sept 2026
Timeline22
Full timeline →gpt-5.6-terra scores 64.617% on LiveBench
livebench_leaderboardgpt-5.6-terra scores 82.893% on LiveBench
livebench_leaderboardgpt-5.6-terra scores 79.307% on LiveBench
livebench_leaderboardgpt-5.6-terra scores 94.908% on LiveBench
livebench_leaderboardgpt-5.6-terra scores 54.95% on LiveBench
livebench_leaderboardgpt-5.6-terra scores 78.245% on LiveBench
livebench_leaderboardgpt-5.6-terra scores 90.635% on LiveBench
livebench_leaderboardgpt-5.6-terra scores 77.936% on LiveBench
livebench_leaderboardgpt-5.6-terra scores 57.58% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 88.01% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 35.35% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 42.91% on Humanity's Last Exam
artificial_analysisgpt-5.6-terra scores 42.25 on Artificial Analysis Intelligence Index
artificial_analysisOpenAI API lists gpt-5.6-terra at $1 in / $6 out per 1M tokens
openrouterOpenAI API lists gpt-5.6-terra at $2 in / $12 out per 1M tokens
openrouterOpenAI API lists gpt-5.6-terra at $2 in / $12 out per 1M tokens
openai
Change history29
Viewing AI Atlas as of 12 Sept 2026 — attributes exactly as the atlas knew them on that day; later corrections are not shown.
Back to today →Attributes as of 12 Sept 2026 28 claims in force
- Release date
- 9 Jul 2026
- Openness
- proprietary
- Context window
- 1.05M tokens
- Max output
- 128K tokens
- Knowledge cutoff
- Feb 2026
- Modalities
- image, text
- Input modalities
- text, image
- Output modalities
- text
- Tokenizer
- GPT
- API model id
- gpt-5.6-terra
- Official page
- Aa context window
- 1,000,000
- Aa openness
- proprietary
- Capabilities
- streaming, structured_outputs, function_calling, file_search, image_input, web_search, prompt_caching
- Default snapshot
- gpt-5.6-terra
- File input
- Yes
- Fine-tuning available
- No
- Aa median output tokens per second
- 75.3
- Openrouter id
- openai/gpt-5.6-terra
- Openrouter listed at
- 9 Jul 2026
- Reasoning
- Yes
- Snapshots
- gpt-5.6-terra
- Structured output
- Yes
- Supported parameters
- include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, tool_choice, tools
- Tool calling
- Yes
- Vision
- Yes
- Weights available
- No
Release daterelease_date1
Opennessopenness1
Context windowcontext_length2conflicting claims
Max outputmax_output_tokens1
Knowledge cutoffknowledge_cutoff1
Modalitiesmodalities1
Input modalitiesmodalities_input5conflicting claims
Output modalitiesmodalities_output1
Tokenizertokenizer1
API model idapi_model_id1
Official pageofficial_url1
Capabilitiescapabilities1
Default snapshotdefault_snapshot1
Descriptiondescription1
File inputfile_input1
Fine-tuning availablefine_tuning_available1
Aa median output tokens per secondmetric.aa_median_output_tokens_per_second1
Openrouter idopenrouter_id1
Reasoningreasoning1
Snapshotssnapshots1
Structured outputstructured_output1
Supported parameterssupported_parameters1
Tool callingtool_calling1
Visionvision1
Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →
Provenance
Attributed facts
24
Source tiers
T1T217 / 7
Freshest observation
10 h ago
Conflicts
5 flagged
Source documents 7
Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.
Data quality (77/100) measures how well AI Atlas knows this entity — completeness, primary-source ratio, freshness, conflicts — never how good the model is. Methodology →