GPT-4o
Key: gpt-4o
Provider: OpenAI
Support: runnable
Capabilities
chat · tools · vision · json_schema
Specifications
| Field | Value |
|---|---|
| Context window | 128 000 tokens |
| Input modalities | text · image · document |
| Output modalities | text |
When to use
A mature multimodal model with a strong track record for tool use and structured output. Use when you need vision + JSON schema output in workflows where GPT-5.x cost is not justified.