400,000 context window · 128,000 max output tokens · Sep 30, 2024 knowledge cutoff · Reasoning token support · Pricing · Pricing is based on the number of tokens used, or other metrics based on the model type.

November 14, 2025 - OpenAI hasn’t published a separate GPT-5.1 price card at time of writing.

November 13, 2025 - 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.

GPT-5.1 is now available in the API. Pricing is the same as GPT-5. We are also releasing gpt-5.1-codex and gpt-5.1-codex-mini in the API, specialized for long-running coding tasks. Prompt caching now lasts up to 24 hours!

November 12, 2025 - GPT‑5.1 Instant and Thinking begin rolling out today, starting with paid (Pro, Plus, Go, Business) users and then to free and logged-out users. Enterprise and Edu plans get a seven-day early-access toggle (off by default).

November 14, 2025 - For casual users, the cost starts with a free tier or trial, while advanced or enterprise-level subscriptions can range from $20 per month to custom pricing based on usage and API…

Explore AI costs with our comprehensive OpenAI gpt-5.1-codex Pricing Calculator. Compare prices for 300+ models across 10+ providers, get accurate API pricing, token costs, and budget estimations.

October 8, 2025 - GPT5's pricing also highlights ... agentic IDEs), the cost of output remains fairly stubborn - at around the $10/1MT price point for state of the art models....

November 13, 2025 - Time: 11m | Cost: $0.39 | +351 net lines across 3 files ... GPT-5.1 took a different architectural approach. Instead of time buckets, it uses sample-based rolling windows with head/tail pointers for O(1) pruning.

Detailed information about gpt-5.1 from OpenAI Inc.. Pricing: Input $1.25/M, Output $10.00/M tokens. Context: 400K tokens.

October 7, 2025 - I don't disagree with you.. but 5.1 codex will often gas light the shit out of you when you task it for verification after a change. ... Not reading all that but GPT-5.1 is far superior to anything Anthropic has.

The AI SDK is the TypeScript toolkit designed to help developers build AI-powered applications with React, Next.js, Vue, Svelte, Node.js, and more.

3 weeks ago - It is: A 400k-context reasoning model (272k input, 128k output) in Azure and partner documentation · Integrated into ChatGPT, Microsoft Copilot and exposed via the OpenAI API · Priced at $1.25 / 1M input tokens, $10 / 1M output ...

October 7, 2025 - Prices per 1M tokens. ... Tokens used for model grading in reinforcement fine-tuning are billed at that model's per-token rate. Inference discounts are available if you enable data sharing when creating the fine-tune job.

3 weeks ago - Unlimited GPT‑5.2 messages, with generous access to GPT‑5.2 Thinking, and access to GPT‑5.2 Pro—plus the flexibility to add credits as needed

Explore developer resources, tutorials, API docs, and dynamic examples to get the most out of OpenAI's platform.

December 1, 2025 - GPT-5.2 is slightly more expensive than GPT-5.1. ... GPT-5 was OpenAI's flagship reasoning model. It has now been superseded by GPT-5.1, which has improved speed and coding performance.

Prompts are billed similarly to other GPT models. Image outputs cost approximately $0.01 (low), $0.04 (medium), and $0.17 (high) for square images. ... For detailed token usage by image quality and size, see the docs.

Important—The price in R$ is merely a reference; this is an international transaction and the final price is subject to exchange rates and the inclusion of IOF taxes. An eNF will not be issued. The GPT-5.1 series is built to respond faster to users in a variety of situations with adaptive reasoning, improving latency and cost efficiency across the series by varying thinking time more significantly.