GPT-4 Turbo Preview

Chat Completions

gpt-4-0125-preview

OpenAI|Created Jun 3, 2025|128k context

Chat Completions

Preview release of GPT-4, featuring improved instruction following, JSON mode, reproducible outputs, and parallel function calling. Trained on data up to December 2023. Heavily rate-limited while in preview.

Overview Specifications Activity Performance Uptime Examples

Throughput

Not enough throughput data

Time-To-First-Token (TTFT)

Not enough TTFT data

GPT-4 Turbo Preview Chat Completions API – Performance & Latency Metrics