gpt-5.6-terra
OpenAIfamily · GPT 5.6developers.openai.com/api/docs/models/gpt-5.6-te
GPT-5.6 model that balances intelligence and cost
Updated 5 h ago · first seen 11 Sept 2026
model_01M293V76WTDQGBAGZGC12SS2B
Overview
Identity
- Canonical model
- Yesidentity confidence: mediumOne row per real model release. Artifacts (checkpoints, quantisations, conversions) and folded evaluation variants point here.
- Official checkpoints
- None recorded — closed weightsofficial_checkpoints = hf_repo identifiers carried by the model itself; artifacts are separate entities pointing here through canonical_id.
- Artifacts
- None recordedSeparate entities (checkpoint · quantization · conversion · packaging) pointing to this model through canonical_id.
- Provider deployments
- 2
- API aliases
- gpt-5-6-terragpt-5-6-terra-highgpt-5-6-terra-lowgpt-5-6-terra-mediumgpt-5-6-terra-non-reasoninggpt-5-6-terra-xhighgpt-5.6-terraopenai/gpt-5.6-terraIdentifiers under which providers and evaluators refer to this model.
- Folded evaluation variants
- 5Effort / thinking variants (…-high, …-non-reasoning) are result configurations of this model, not separate models. Their old URLs redirect here.
Openness
Closed / proprietary— weights not available; 7 dimensions unknown.
Weights are not available; the model is reachable only through an API or a product.
Weights
No
Inference code
—
Training code
—
Training data
—
Dataset
—
Commercial use
—
Redistribution
—
Derivatives
—
dimensions marked null are unknown, not false
Key facts
- Release date
Source:OpenRouter public model & pricing listingT2observed 16 h agomedium
- Knowledge cutoff
Source:OpenAI Platform docsT1observed 16 h agohigh
- Official page
Source:OpenAI Platform docsT1observed 16 h agohigh
- API model id
Source:OpenAI Platform docsT1observed 16 h agohigh
- Openrouter id
Source:OpenRouter public model & pricing listingT2observed 16 h agomedium
Architecture
- Tokenizer
Source:OpenRouter public model & pricing listingT2observed 16 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:OpenRouter public model & pricing listingT2observed 5 h agomedium
- Max output
Source:OpenAI Platform docsT1observed 16 h agohigh
- Knowledge cutoff
Source:OpenAI Platform docsT1observed 16 h agohigh
- Tokenizer
Source:OpenRouter public model & pricing listingT2observed 16 h agomedium
Benchmarks116
Compare with another model →Comparable same task and conditions · Partially comparable same task, conditions differ (effort, temperature, judge) · Not comparable different variant or metric
Current rows only, grouped by benchmark → canonical metric → comparability group (task configuration). Effort variants folded into this model appear as rows of the same group. 116 current rows in total. “vs leader” compares with the current leader of the benchmark's primary group only; other groups are not directly comparable. Comparability rules →
Providers & Pricing5
All offers in the price terminal →USD per 1M tokens as published by each provider; native units (per-request fees, flex/priority tiers) are kept verbatim. Rows are append-only — every price change is kept in the history below. Cost of a workload →
Price history
Output price · USD / 1M tokens 2 providers
- OpenAI API
- OpenRouter
- OpenRouter$12 → $612 Sept 2026
- OpenRouterfirst observed $1212 Sept 2026
- OpenAI API$12 → $611 Sept 2026
- OpenAI APIfirst observed $1211 Sept 2026
Input price · USD / 1M tokens 2 providers
- OpenAI API
- OpenRouter
- OpenRouter$2 → $112 Sept 2026
- OpenRouterfirst observed $212 Sept 2026
- OpenAI API$2 → $111 Sept 2026
- OpenAI APIfirst observed $211 Sept 2026
Versions & Artifacts0
Version history
Context window2 changes
11 Sept 2026→11 Sept 2026→12 Sept 2026current
Knowledge cutofffirst observation only
11 Sept 2026current
Max outputfirst observation only
11 Sept 2026current
Opennessfirst observation only
11 Sept 2026current
Each hop is a claim: click a value for its source, tier and observation time. Nothing is overwritten — a new observation closes the previous claim.
Artifacts 0
No artifact (checkpoint, quantisation, conversion or packaging) points to this model yet.
Timeline30
Full timeline →OpenRouter lists gpt-5.6-terra at $1 in / $6 out per 1M tokens
openrouterOpenRouter lists gpt-5.6-terra at $2 in / $12 out per 1M tokens
openroutergpt-5.6-terra: context length changed from 1000000 to 1050000
Context window1M tokens→1.05M tokensopenroutergpt-5.6-terra scores 72.28% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 1.01% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 33.27% on Humanity's Last Exam
artificial_analysisgpt-5.6-terra scores 87.17% on GPQA Diamond
artificial_analysisgpt-5.6-terra scores 30.42 on Artificial Analysis Intelligence Index
artificial_analysisgpt-5.6-terra scores 57.58% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 75.66% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 1.52% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 38.51% on Humanity's Last Exam
artificial_analysisgpt-5.6-terra scores 89.6% on GPQA Diamond
artificial_analysisgpt-5.6-terra scores 34.49 on Artificial Analysis Intelligence Index
artificial_analysisgpt-5.6-terra scores 56.18% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 11.4% on Humanity's Last Exam
artificial_analysisgpt-5.6-terra scores 74.65% on GPQA Diamond
artificial_analysisgpt-5.6-terra scores 22.3 on Artificial Analysis Intelligence Index
artificial_analysisgpt-5.6-terra scores 62.88% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 80.15% on Terminal-Bench
artificial_analysisgpt-5.6-terra scores 10.1% on Terminal-Bench
artificial_analysis
Change history56
Viewing AI Atlas as of 1 Sept 2026 — attributes exactly as the atlas knew them on that day; later corrections are not shown.
Back to today →gpt-5.6-terra was not yet in AI Atlas on 1 Sept 2026
Release daterelease_date1
Opennessopenness6
Context windowcontext_length8conflicting claims
Max outputmax_output_tokens1
Knowledge cutoffknowledge_cutoff1
Modalitiesmodalities2conflicting claims
Input modalitiesmodalities_input6conflicting claims
Output modalitiesmodalities_output1
Tokenizertokenizer1
API model idapi_model_id1
Official pageofficial_url1
Aa context windowaa_context_window1
Aa opennessaa_openness1
Capabilitiescapabilities1
Default snapshotdefault_snapshot1
Descriptiondescription1
File inputfile_input1
Fine-tuning availablefine_tuning_available1
Aa median output tokens per secondmetric.aa_median_output_tokens_per_second6
Openrouter idopenrouter_id1
Openrouter listed atopenrouter_listed_at1
Reasoningreasoning6
Snapshotssnapshots1
Structured outputstructured_output1
Supported parameterssupported_parameters1
Tool callingtool_calling1
Visionvision1
Weights availableweights_available1
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
29
Source tiers
T1T216 / 13
Freshest observation
5 h ago
Conflicts
7 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 (73/100) measures how well AI Atlas knows this entity — completeness, primary-source ratio, freshness, conflicts — never how good the model is. Methodology →