LONG MEMORY · SpaceXAI
Grok 4.20
Grok 4.20 is a reasoning, tool-using model from SpaceXAI in the Grok family, living in Snow Country (long memory). It reads text, files and images and writes text, with a 2M-token context window and up to 1.8M tokens of output. On OpenRouter it costs $1.25 per million input tokens and $2.50 per million output tokens.
See Grok 4.20 in 3DOpen in the WorktableView on OpenRouter
Specifications
- Provider
- SpaceXAI
- Family
- Grok
- Province
- Snow Country
- Context window
- 2M tokens
- Maximum output
- 1.8M tokens
- Input / 1M tokens
- $1.25
- Output / 1M tokens
- $2.50
- Accepts
- text, files, images
- Produces
- text
- Reasoning
- Yes
- Tool use
- Yes
- Added to OpenRouter
- 2026-03-31
- Model ID
x-ai/grok-4.20- Price history
- —All recorded prices
From the 2026-10-24 catalog snapshot. Prices are US dollars per million tokens.