OpenAI · Balanced
GPT 5 Pro
The highest performing version of the flagship model GPT 5 by OpenAI.
- Reasoning
- Vision
- Input
- Text, Images
- Output
- Text
- Reasoning effort
- high
- Discovery tier
- Balanced
Pricing
USD per 1M tokens- Input
- $15.00
- Output
- $120.00
- Cache read
- $1.50
Reference prices as published by the model provider. API example
Specifications
- Context window
- 400K
- Max output
- 128K
- Average output (7 days)
- 90 tokens
- Longer than 8% of 468 models
Side by side
GPT 5 Pro compared
Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.
| GPT 5 ProOpenAIThis model | GPT 6 SolOpenAIRemove | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Discovery tier | Balanced | Frontier |
| Added | Oct 6, 2025 | Sep 22, 2026 |
| Limits | ||
| Context window | 400K | 1.05MBest |
| Max output | 128K | 128K |
| Average output | 90 tokens | 315 tokens |
| Pricing, USD per 1M tokens | ||
| Input | $15.00 | $2.00Best |
| Output | $120.00 | $10.00Best |
| Cache read | $1.50 | $0.20Best |
| Cache write | — | $2.50 |
| Performance | ||
| Request success (24h) | — | 100.0% |
| Benchmark indexes | ||
| Intelligence Index | — | 39.8 |
| Capabilities | ||
| Reasoning | Yes | Yes |
| Tools | No | Yes |
| Vision | Yes | Yes |
| Structured output | No | Yes |
| PDF input | No | Yes |
| Reasoning effort | high | none, low, medium, high, xhigh, max |
Public evaluations
Benchmarks
Independent evaluation results, with how each score ranks among the models in the Noumen catalog.
- GPT 5 Pro
- GPT 6 Sol
Intelligence Index
- GPT 5 Pro—
- GPT 6 Sol39.8
Agentic work
AutomationBench-AA
Workflow automation, penalized for guardrail violations
- GPT 5 Pro: —
- GPT 6 Sol: 58.0%
AutomationBench-AA tasks completed
Workflows finished end to end without a guardrail violation
- GPT 5 Pro: —
- GPT 6 Sol: 28.2%
AA-Briefcasev1.1
Agentic knowledge work, rated head to head
- GPT 5 Pro: —
- GPT 6 Sol: 1,148 Elo
GDPval-AAv2.1
Economically valuable occupational tasks, rated head to head
- GPT 5 Pro: —
- GPT 6 Sol: 1,346 Elo
Document reasoning
GDP.pdf
Professional reasoning over PDF documents, all-pass rate
- GPT 5 Pro: —
- GPT 6 Sol: 23.8%
AA-LCRv1.1
Reasoning across long documents
- GPT 5 Pro: —
- GPT 6 Sol: 82.3%
MLCR-AA
Long-context reasoning over medical records
- GPT 5 Pro: —
- GPT 6 Sol: 28.9%
Reasoning and knowledge
Humanity’s Last Exam
Expert-level questions across academic fields
- GPT 5 Pro: —
- GPT 6 Sol: 41.0%
Coding
Terminal-Benchv4.0
Practical software engineering in a terminal
- GPT 5 Pro: —
- GPT 6 Sol: 18.7%
SciCode
Scientific computing in Python
- GPT 5 Pro: —
- GPT 6 Sol: 53.8%
Legacy evaluations
AA-LCR (unversioned)
Long-context reasoning, earlier grading
- GPT 5 Pro: —
- GPT 6 Sol: 82.3%
Scores from Artificial Analysis, updated Oct 26, 2026. Artificial Analysis
- GPT 5 Pro
- GPT 6 Sol
| Leaderboard | GPT 5 Pro | GPT 6 Sol |
|---|---|---|
| Roleplay | Not in top 20 | #9 · 35.3% |
| Creative writing | Not in top 20 | #6 · 45.3% |
Ranks among Noumen catalog models on Use cases leaderboards. Only top-20 placements are listed.
- GPT 5 Pro
- GPT 6 Sol
| Leaderboard | GPT 5 Pro | GPT 6 Sol |
|---|---|---|
| WebDev Overall | Not in top 20 | #8 · 1680.8 |
| WebDev · Image To Webdev | Not in top 20 | #7 · 1660.5 |
| WebDev · Webdev | Not in top 20 | #8 · 1680.8 |
| WebDev · Webdev-html | Not in top 20 | #7 · 1683.6 |
| WebDev · Webdev-react | Not in top 20 | #9 · 1684.2 |
Ranks among Noumen catalog models on LMArena leaderboards. Only top-20 placements are listed.LMArena
- GPT 5 Pro
- GPT 6 Sol
| Leaderboard | GPT 5 Pro | GPT 6 Sol |
|---|---|---|
| FrontierCode Main | Not in top 20 | #8 · 49.3% |
| FrontierCode Extended | Not in top 20 | #8 · 60.7% |
Ranks among Noumen catalog models on FrontierCode leaderboards. Only top-20 placements are listed.FrontierCode
- GPT 5 Pro
- GPT 6 Sol
| Leaderboard | GPT 5 Pro | GPT 6 Sol |
|---|---|---|
| Epoch Capabilities Index | Not in top 20 | #8 · 163.7 |
Ranks among Noumen catalog models on Epoch AI leaderboards. Only top-20 placements are listed.Epoch AI
- GPT 5 Pro
- GPT 6 Sol
| Leaderboard | GPT 5 Pro | GPT 6 Sol |
|---|---|---|
| ARC-AGI-1 | Not in top 20 | #15 · 95.5% |
| ARC-AGI-2 | Not in top 20 | #8 · 89.6% |
| ARC-AGI-3 (Default harness) | Not in top 20 | #8 · 4.6% |
Ranks among Noumen catalog models on ARC Prize leaderboards. Only top-20 placements are listed.ARC Prize
- GPT 5 Pro
- GPT 6 Sol
| Leaderboard | GPT 5 Pro | GPT 6 Sol |
|---|---|---|
| Creative Writing v3 | Not in top 20 | #4 · 2125 |
| Longform Writing | Not in top 20 | #7 · 82.8 |
Ranks among Noumen catalog models on EQ-Bench leaderboards. Only top-20 placements are listed.EQ-Bench
- GPT 5 Pro
- GPT 6 Sol
| Leaderboard | GPT 5 Pro | GPT 6 Sol |
|---|---|---|
| Game Development | Not in top 20 | #18 · 1310 |
| SVG | Not in top 20 | #6 · 1309 |
| 3D | Not in top 20 | #17 · 1310 |
| ASCII Art | Not in top 20 | #19 · 1217 |
| Web Apps | Not in top 20 | #14 · 1232 |
| Full Stack | Not in top 20 | #12 · 1237 |
| Mobile Apps | Not in top 20 | #18 · 1191 |
Ranks among Noumen catalog models on Design Arena leaderboards. Only top-20 placements are listed.Design Arena
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-5-pro",
"reasoning_effort": "high",
"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-5-pro",
messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)OpenAI
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