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OpenAI · Frontier

GPT Terra Latest

Added Sep 11, 2026

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Use in the app

Compatibility alias that routes to GPT 5.6 Terra, the latest supported GPT Terra model.

  • Reasoning
  • Tools
  • Vision
  • Structured output
  • PDF input
Input
Text, Images
Output
Text
Reasoning effort
none · low · medium · high · xhigh · max
Discovery tier
Frontier

Pricing

USD per 1M tokens
Input
$2.00
Output
$12.00
Cache read
$0.20
Cache write
$2.50

Reference prices as published by the model provider. API example

Specifications

Context window
1.1M
Max output
128K
Average output (7 days)
223 tokens
Longer than 23% of 465 models

Side by side

GPT Terra Latest compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

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GPT Terra LatestOpenAIThis modelClaude Sonnet 4.6 ThinkingAnthropicRemove
ProviderOpenAIAnthropic
Discovery tierFrontierFrontier
AddedSep 11, 2026Feb 17, 2026
Limits
Context window1.05MBest1M
Max output128K128K
Average output223 tokens598 tokens
Pricing, USD per 1M tokens
Input$2.00Best$3.00
Output$12.00Best$15.00
Cache read$0.20Best$0.30
Cache write$2.50—
Performance
Throughput—208.2 tok/s
Time to first token—4.3 s
Request success (24h)100.0%100.0%
Benchmark indexes
Intelligence Index30.130.1
Coding Index64.7Best63.0
Capabilities
ReasoningYesYes
ToolsYesYes
VisionYesYes
Structured outputYesYes
PDF inputYesYes
Reasoning effortnone, low, medium, high, xhigh, maxlow, medium, high, xhigh, max

Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

  • GPT Terra Latest
  • Claude Sonnet 4.6 Thinking

Intelligence Index

  • GPT Terra Latest30.1
  • Claude Sonnet 4.6 Thinking30.1

GPT Terra Latest tested at medium reasoning effort

GPT Terra Latest: Better than 73% of 326 scored models

3.8Catalog models by score55.1

Indexes

  • Coding Index

    Composite of the coding evaluations

    • GPT Terra Latest: 64.7Top
    • Claude Sonnet 4.6 Thinking: 63.0

Agentic work

  • AutomationBench-AA

    Workflow automation, penalized for guardrail violations

    • GPT Terra Latest: 33.5%Top
    • Claude Sonnet 4.6 Thinking: 20.1%

  • AutomationBench-AA tasks completed

    Workflows finished end to end without a guardrail violation

    • GPT Terra Latest: 7.2%Top
    • Claude Sonnet 4.6 Thinking: 3.7%

  • AA-Briefcasev1.1

    Agentic knowledge work, rated head to head

    • GPT Terra Latest: 1,038 Elo
    • Claude Sonnet 4.6 Thinking: 1,062 EloTop

  • GDPval-AAv2.1

    Economically valuable occupational tasks, rated head to head

    • GPT Terra Latest: 1,266 EloTop
    • Claude Sonnet 4.6 Thinking: 1,233 Elo

Document reasoning

  • GDP.pdf

    Professional reasoning over PDF documents, all-pass rate

    • GPT Terra Latest: 17.0%Top
    • Claude Sonnet 4.6 Thinking: 15.8%

  • AA-LCRv1.1

    Reasoning across long documents

    • GPT Terra Latest: 74.0%
    • Claude Sonnet 4.6 Thinking: 80.0%Top

  • MLCR-AA

    Long-context reasoning over medical records

    • GPT Terra Latest: 22.8%Top
    • Claude Sonnet 4.6 Thinking: 7.8%

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • GPT Terra Latest: 33.3%
    • Claude Sonnet 4.6 Thinking: 33.6%Top

  • GPQA Diamond

    Graduate-level science questions

    • GPT Terra Latest: 87.2%
    • Claude Sonnet 4.6 Thinking: 87.5%Top

  • IFBench

    Following precise output instructions

    • GPT Terra Latest: 62.2%Top
    • Claude Sonnet 4.6 Thinking: 56.6%

Coding

  • Terminal-Benchv4.0

    Practical software engineering in a terminal

    • GPT Terra Latest: 1.0%
    • Claude Sonnet 4.6 Thinking: 3.0%Top

  • SciCode

    Scientific computing in Python

    • GPT Terra Latest: 50.5%Top
    • Claude Sonnet 4.6 Thinking: 50.1%

Legacy evaluations

  • Terminal-Bench Hard

    Earlier terminal task suite

    • GPT Terra Latest: —
    • Claude Sonnet 4.6 Thinking: 53.0%

  • τ²-Bench Telecom

    Tool use in a customer-support simulation

    • GPT Terra Latest: 72.8%
    • Claude Sonnet 4.6 Thinking: 75.7%Top

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • GPT Terra Latest: 74.0%
    • Claude Sonnet 4.6 Thinking: 80.0%Top

Scores from Artificial Analysis, updated Oct 26, 2026. GPT Terra Latest was tested at medium reasoning effort; compare scores measured at the same effort.Artificial Analysis

Live routing data

Performance and reliability

Recent averages across requests routed for this model. Your own speed depends on prompt length, reasoning effort and load.

Prompt cache hits
82.5%
About $0.52 per 1M input tokens with caching
Request success (24h)
100.0%
Reliable

Cache hits are the share of input tokens recently served from a prompt cache across all requests. They are not a forecast of your own hit rate.

Hourly request success · last 72 hoursLowest hour 100.0%
  • Healthy (98% or more)
  • Degraded (90–98%)
  • Down (under 90%)
  • No requests

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart
curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-terra-latest",
    "reasoning_effort": "medium",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'
import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="openai/gpt-terra-latest",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

OpenAI

Other OpenAI models, starting with the same family.