Model page
DeepSeek V4 Pro
DeepSeek-V4-Pro via Fireworks: flagship open-source 1.6T MoE model for frontier reasoning, advanced coding, and long-context agentic workflows. 1M context. Function calling supported. Uses 1 premium request per send before length multipliers. Does not support web search or image input.
Key dates
We use concrete dates and keep them consistent across the site.
Capability
Intelligence
High
Capability
Speed
Medium
Capability
Context window
1,048,600 tokens
Modalities
Input and output
Input: Text
Output: Text
Features
Availability notes
Cached input: $0.14 / 1M tokens · 1 premium request per send before length multipliers · Function calling supported · Fine-tuning not supported on Fireworks serverless · On-demand Fireworks deployments available separately
ChatGPT
GPT‑4o retirement (ChatGPT)
OpenAI is retiring GPT‑4o inside ChatGPT on February 13, 2026. This does not automatically imply API removal.