gpt-5.1OpenAI
- endpoints
- 6
- regions
- 4
- api
- chat
- released
- November 2025
- eu routing
- available
capabilities 5/8
The same weights cost 2.2x more on microsoft azure ai than on openai inc.. That is what the endpoints table is for.
| # | flags | ||||||
|---|---|---|---|---|---|---|---|
| 1 |  OpenAI Inc. | Global | 400K | $0.63 | $5.00 | $0.06 | no-train |
| 2 |  Microsoft Azure AI | Global | 400K | $1.25 | $10.00 | $0.13 | zdr |
| 3 | OpenAI Inc. | Global | 400K | $1.25 | $10.00 | $0.13 | no-train |
| 4 | Microsoft Azure AI | eastus2 | 400K | $1.25 | $10.00 | $0.13 | zdr |
| 5 | Microsoft Azure AI | francecentral | 400K | $1.38 | $11.00 | $0.14 | zdr |
| 6 | Microsoft Azure AI | swedencentral | 400K | $1.38 | $11.00 | $0.14 | zdr |
no measured traffic for this model yet. the endpoints table above carries provider pricing
| eval | Score as a share of 100 | /100 |
|---|---|---|
| Math Index | 94.0 | |
| AIME 2025 | 94.0 | |
| GPQA Diamond | 87.3 | |
| MMLU Pro | 87.0 | |
| LiveCodeBench | 86.8 | |
| τ²-Bench | 81.9 | |
| Coding Index | 49.4 | |
| Terminal-Bench Hard | 45.5 | |
| Humanity's Last Exam | 28.5 | |
| Intelligence Index | 24.7 | |
| 10 evals | mean | 67.9 |
Scores from Artificial Analysis and public leaderboards, normalised to 100. Bar colour is the band, not the rank: green 80 and up, blue 55 and up, amber 30 and up. Benchmarks measure narrow skills, so test on your own workload before committing. Released 2025-11-13.
gpt-5.1@eusame routing, restricted to eu-hosted providers. use this id when data residency is a requirement; requests never leave the eu
Base url is https://router.requesty.ai/v1 for every id here. One key reaches the whole catalog.
from openai import OpenAI client = OpenAI( api_key="YOUR_REQUESTY_API_KEY", base_url="https://router.requesty.ai/v1",) response = client.chat.completions.create( model="openai/gpt-5.1:flex", messages=[ {"role": "user", "content": "Explain quantum computing in one paragraph."}, ],) print(response.choices[0].message.content)
Change the base url, use your Requesty key, set the model to any id in the call pane. Existing OpenAI SDK code needs no other edit, and the same key reaches every other model in the catalog, so switching later is a one-parameter change. Browse all models
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning to allocate computation dynamically, responding quickly to simple queries while spending more depth on complex tasks. The model produces clearer, more grounded explanations with reduced jargon, making it easier to follow even on technical or multi-step problems. Built for broad task coverage, GPT-5.1 delivers consistent gains across math, coding, and structured analysis workloads, with more coherent long-form answers and improved tool-use reliability. It also features refined conversational alignment, enabling warmer, more intuitive responses without compromising precision. GPT-5.1 serves as the primary full-capability successor to GPT-5
questions 5
Which providers serve gpt-5.1?
How much does gpt-5.1 cost?
Is gpt-5.1 open weights?
What is the context window of gpt-5.1?
How do I use gpt-5.1 with the OpenAI SDK?
more from openai 6
| model | context | from /M | providers |
|---|---|---|---|
| gpt-6-astra | 1.1M | $5.00 | 2 |
| gpt-5.6-luna | 1.1M | $0.10 | 3 |
| gpt-5.6-terra | 1.1M | $1.00 | 3 |
| gpt-5.6-sol | 1.1M | $2.50 | 3 |
| gpt-5.5-pro | 1.1M | $30.00 | 1 |
| gpt-5.5 | 1.1M | $2.50 | 3 |
route gpt-5.1 through one endpoint
One key for 2 providers on this model and 600+ others. No markup on provider prices, automatic failover, caching built in. Weekly aggregates in the measured pane come from production traffic routed through Requesty, one line per provider on a shared axis. Methodology