x-ai/grok-4.20Grok 4.20 is xAI’s proprietary AI model, released Feb 17, 2026. It scores 152 on the Epoch Capabilities Index, costs $1.25/M input and $2.50/M output tokens, and handles a 2M-token context window.
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities.
Scores on standardized evaluations. Higher is better — and rank shows where Grok 4.20 lands among all models tracked on Model Beat.
Abstract visual reasoning
Harder abstract reasoning
Graduate-level scientific reasoning
Factual accuracy & hallucination
Novel ML problem-solving
Human-rated web development
Olympiad-qualifier math
Command-line agentic tasks
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities.
Grok 4.20 is an AI model developed by xAI, part of the Grok family, released Feb 17, 2026.
Grok 4.20's list price from xAI is $1.25 per million input tokens and $2.50 per million output tokens.
Grok 4.20 supports a context window of up to 2M tokens.
On standardized evaluations tracked by Epoch AI, Grok 4.20 scores 89.3% on GPQA Diamond, 65.1% on ARC-AGI-2, 57.3% on Terminal-Bench.
Grok 4.20 is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Nov 12, 2026.