OpenAI · Frontier
GPT Terra Latest
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.
| GPT Terra LatestOpenAIThis model | GPT 6 Luna ProOpenAIRemove | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Discovery tier | Frontier | Efficient |
| Added | Sep 11, 2026 | Sep 22, 2026 |
| Limits | ||
| Context window | 1.05M | 1.05M |
| Max output | 128K | 128K |
| Average output | 223 tokens | 2.8K tokens |
| Pricing, USD per 1M tokens | ||
| Input | $2.00 | $0.10Best |
| Output | $12.00 | $0.50Best |
| Cache read | $0.20 | $0.01Best |
| Cache write | $2.50 | $0.13Best |
| Performance | ||
| Throughput | — | 245.6 tok/s |
| Time to first token | — | 22.2 s |
| Request success (24h) | 100.0% | 100.0% |
| Benchmark indexes | ||
| Intelligence Index | 30.1 | — |
| Coding Index | 64.7 | — |
| Capabilities | ||
| Reasoning | Yes | Yes |
| Tools | Yes | Yes |
| Vision | Yes | Yes |
| Structured output | Yes | Yes |
| PDF input | Yes | Yes |
| Reasoning effort | none, low, medium, high, xhigh, max | low, 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
- GPT 6 Luna Pro
Intelligence Index
- GPT Terra Latest30.1
- GPT 6 Luna Pro—
GPT Terra Latest tested at medium reasoning effort
GPT Terra Latest: Better than 73% of 326 scored models
Indexes
Coding Index
Composite of the coding evaluations
- GPT Terra Latest: 64.7
- GPT 6 Luna Pro: —
Agentic work
AutomationBench-AA
Workflow automation, penalized for guardrail violations
- GPT Terra Latest: 33.5%
- GPT 6 Luna Pro: —
AutomationBench-AA tasks completed
Workflows finished end to end without a guardrail violation
- GPT Terra Latest: 7.2%
- GPT 6 Luna Pro: —
AA-Briefcasev1.1
Agentic knowledge work, rated head to head
- GPT Terra Latest: 1,038 Elo
- GPT 6 Luna Pro: —
GDPval-AAv2.1
Economically valuable occupational tasks, rated head to head
- GPT Terra Latest: 1,266 Elo
- GPT 6 Luna Pro: —
Document reasoning
GDP.pdf
Professional reasoning over PDF documents, all-pass rate
- GPT Terra Latest: 17.0%
- GPT 6 Luna Pro: —
AA-LCRv1.1
Reasoning across long documents
- GPT Terra Latest: 74.0%
- GPT 6 Luna Pro: —
MLCR-AA
Long-context reasoning over medical records
- GPT Terra Latest: 22.8%
- GPT 6 Luna Pro: —
Reasoning and knowledge
Humanity’s Last Exam
Expert-level questions across academic fields
- GPT Terra Latest: 33.3%
- GPT 6 Luna Pro: —
GPQA Diamond
Graduate-level science questions
- GPT Terra Latest: 87.2%
- GPT 6 Luna Pro: —
IFBench
Following precise output instructions
- GPT Terra Latest: 62.2%
- GPT 6 Luna Pro: —
Coding
Terminal-Benchv4.0
Practical software engineering in a terminal
- GPT Terra Latest: 1.0%
- GPT 6 Luna Pro: —
SciCode
Scientific computing in Python
- GPT Terra Latest: 50.5%
- GPT 6 Luna Pro: —
Legacy evaluations
τ²-Bench Telecom
Tool use in a customer-support simulation
- GPT Terra Latest: 72.8%
- GPT 6 Luna Pro: —
AA-LCR (unversioned)
Long-context reasoning, earlier grading
- GPT Terra Latest: 74.0%
- GPT 6 Luna Pro: —
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.
- 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.
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
Related models
Other OpenAI models, starting with the same family.