OpenAI: gpt-5-chat-latest API
The dynamic latest endpoint for the GPT-5 series. It features "Adaptive Interaction," seamlessly switching between Instant Response and Deep Thinking based on intent. Optimized for a more empathetic tone, it effectively resolves instruction drift in ultra-long, multi-turn conversations.
- Context window: 400,000 tokens
- Max output: 128,000 tokens
- Input: text, image
- Output: text
- Reasoning: Supported
- Tool calling: Supported
- File input: Supported
- Released: 2025-08-07
- Knowledge cutoff: 2024-09-30
Frequently Asked Questions
What is the context window of gpt-5-chat-latest?
gpt-5-chat-latest supports a context window of up to 400,000 tokens.
Does gpt-5-chat-latest support function calling?
Yes. gpt-5-chat-latest supports tool / function calling.
Does gpt-5-chat-latest support reasoning?
Yes. gpt-5-chat-latest is a reasoning-capable model.
What is the knowledge cutoff of gpt-5-chat-latest?
The knowledge cutoff of gpt-5-chat-latest is 2024-09-30.