Large Context Window
Processes up to 400,000 tokens in a single request, enabling analysis of long documents, codebases, or extended conversation histories.
OpenAI
GPT-5 Chat
GPT-5 Chat is a text generation model developed by OpenAI and serves as the snapshot of GPT-5 currently deployed in ChatGPT. It has a 400,000-token context window and a training data cutoff of September 2024. The model supports tool use and MCP (Model Context Protocol) servers as input types, making it suitable for agentic workflows and integrations. GPT-5 Chat is designed for high-intelligence tasks that benefit from a large context window, such as long-document analysis, multi-step reasoning, and complex instruction following. Its support for tools and MCP servers means it can be connected to external services and data sources within automated pipelines. Developers accessing it via the API receive the same model version that powers the ChatGPT interface, keeping behavior consistent across both surfaces.
Aug 07, 2025
400,000 context
16,384 tokens output
Large Context Window
Tool Use
MCP Server Support
Text Generation
Latest Snapshot Tracking
Model Overview
High-signal model metadata in a structured two-column overview table.
Provider
The entity that provides this model.
OpenAI
Model ID
The routed model identifier exposed by upstream providers.
openai/gpt-5-chat
Input Context Window
The number of tokens supported by the input context window.
400,000
tokens
Maximum Output Tokens
The number of tokens that can be generated by the model in a single request.
16,384 tokens
tokens
Open Source
Whether the model's code is available for public use.
No
Release Date
When the model was first released.
Aug 07, 2025
10 months ago
Knowledge Cut-off Date
When the model's knowledge was last updated.
September 2024
API Providers
The providers that offer this model. This is not an exhaustive list.
OpenAI
Modalities
Types of data this model can process.
Text
Image
File
What is GPT-5 Chat
A fuller summary of positioning, capabilities, and source-specific details for GPT-5 Chat.
GPT-5 Chat is a text generation model developed by OpenAI and serves as the snapshot of GPT-5 currently deployed in ChatGPT. It has a 400,000-token context window and a training data cutoff of September 2024. The model supports tool use and MCP (Model Context Protocol) servers as input types, making it suitable for agentic workflows and integrations.
GPT-5 Chat is designed for high-intelligence tasks that benefit from a large context window, such as long-document analysis, multi-step reasoning, and complex instruction following. Its support for tools and MCP servers means it can be connected to external services and data sources within automated pipelines. Developers accessing it via the API receive the same model version that powers the ChatGPT interface, keeping behavior consistent across both surfaces.
Capabilities
What GPT-5 Chat supports
Tool Use
Supports function calling and external tool integrations, allowing the model to invoke developer-defined tools during a conversation.
MCP Server Support
Accepts Model Context Protocol servers as inputs, enabling structured connections to external data sources and services within agentic pipelines.
Text Generation
Generates coherent, contextually accurate text across tasks including summarization, drafting, question answering, and instruction following.
Latest Snapshot Tracking
The gpt-5-chat identifier always points to the GPT-5 snapshot currently active in ChatGPT, so API responses reflect the same model version as the consumer product.
Pricing for GPT-5 Chat
Primary API pricing shown in the same “quick compare” spirit as the reference page.
Input tokens
$1.25
Per million tokens
Output tokens
$10.00
Per million tokens
Price Comparison
Additional usage-cost dimensions synced into the project for this model.
Web search
$10000.00
Cache read
$0.13
maxTemperature
2
maxResponseSize
16,384 tokens
API Access & Providers
Places where this model is available, based on the synced detail-page metadata.
OpenAI
Provider Endpoints
Endpoint-level provider data currently available for this model.
OpenAI
Model Performance
Benchmark scores synced from the current model source and normalized into the local catalog.
| Benchmark | Score |
|---|---|
|
AIME 2024
American math olympiad problems
|
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GPQA Diamond
PhD-level science questions (biology, physics, chemistry)
|
|
|
HLE
Questions that challenge frontier models across many domains
|
|
|
LiveCodeBench
Real-world coding tasks from recent competitions
|
|
|
MATH-500
Undergraduate and competition-level math problems
|
|
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MMLU-Pro
Expert knowledge across 14 academic disciplines
|
|
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SciCode
Scientific research coding and numerical methods
|
Resources & Documentation
Official model cards, release notes, docs, and other references synced from the source page.
FAQ
Common questions about GPT-5 Chat
What is the context window for GPT-5 Chat?
GPT-5 Chat supports a context window of 400,000 tokens, allowing very long inputs and conversation histories in a single request.
What is the training data cutoff for GPT-5 Chat?
The model's training data has a cutoff of September 2024, meaning it does not have knowledge of events that occurred after that date.
Does GPT-5 Chat support tool calling and MCP servers?
Yes. GPT-5 Chat supports both tool use (function calling) and Model Context Protocol (MCP) servers as input types, making it suitable for agentic and integration-heavy workflows.
Is GPT-5 Chat the same model used in ChatGPT?
Yes. The gpt-5-chat model ID points to the GPT-5 snapshot that OpenAI currently uses in ChatGPT, so API behavior mirrors the consumer product.
Who publishes GPT-5 Chat?
GPT-5 Chat is published by OpenAI and was added to the MindStudio model catalog on August 7, 2025.
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