This model was retired on 2028-01-11. The pricing below is the last-known rate, kept for migration reference.

GPT-5.6 TerraDeprecated

OpenAIReleasedJul 9, 2026KnowledgeFeb 2026
VisionTool useReasoningPrompt cachingStructured outputWeb search
Context
922K
Max output
128K
Serving providers
3
Cheapest input
$2.00 /1M
Prices are on-demand list rates. Enterprise commitments (committed-use discounts, provisioned throughput, negotiated rates) can be materially lower.

Benchmarks

independent evaluations · source: ARC Prize and Artificial Analysis
Speed & latency
Output speed
109 t/s
tokens / second
Time to first token
159.80s
latency
Headline indices
Intelligence Index
56.6
of 100
Coding Index
76.7
of 100
Agentic Index
50.2
of 100
Individual benchmarks · click a row for effort variants
BenchmarkBest scoreEffortCost / task
APEX Agents39%default
ARC-AGI-284%max$1.09
Automation Bench0.5default
CritPt30%default
GDPval1576.3default
GPQA Diamond93%default
Harvey Lab0.9default
Humanity's Last Exam43%default
IFBench71%default
IT-Bench SRE51%default
Long-Context Reasoning80%default
Mlcr Overall0.3default
MMMU-Pro81%default
Omniscience0.1default
Omniscience Accuracy0.5default
Omniscience Non Hallucination0.1default
SciCode54%default
TerminalBench Hard63%xhigh
TerminalBench v2.188%default
τ-bench Banking40%default
τ²-bench86%default

Pricing detail

cost beyond the standard rate · source: models.dev
Long context (>200K)
$5.00 / $22.50
input / output · per 1M

Pricing by serving provider

last-known · per 1M tokens · click a provider to expand
Serving providerInput /1MOutput /1MEndpoints
Azure$2.00$12.001
OpenAI$2.00$12.001
OpenRouter$2.00$12.001

Price history

input + output $/1M since we started tracking
Input Output
Input down 20% since first tracked
$0.000$5.00$10.00$15.00Jul 10Jul 19Aug 5Aug 28$12.00$2.00

Cost calculator

estimate your monthly spend on this model
$1,360
estimated / month

Model IDs

copy the exact identifier for your platform
azure/gpt-5.6-terragpt-5.6-terraopenai/gpt-5.6-terra

Frequently asked questions

GPT-5.6 Terra pricing, context and availability

Is GPT-5.6 Terra still available?

GPT-5.6 Terra was retired on 2028-01-11. The pricing on this page is the last-known rate, kept for migration reference.

How much did GPT-5.6 Terra cost?

GPT-5.6 Terra's last-known pricing, before it was retired on 2028-01-11, was $2.00 per 1M input tokens and $12.00 per 1M output tokens.

What was the context window of GPT-5.6 Terra?

GPT-5.6 Terra had a 922K token context window and could return up to 128K output tokens.

What could GPT-5.6 Terra do?

GPT-5.6 Terra supported image input (vision), tool use, reasoning, prompt caching, structured output and web search.

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Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily

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