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Grok 4.20

Grok 4.20 is an AI model made by xAI. xAI released it on 10 March 2026. It is generally available. It takes text, image and returns text.

xAI

Grok 4.20 is an AI model made by xAI. xAI released it on 10 March 2026. It is generally available. It takes text, image and returns text. Its context window is 1,000,000 tokens.

Released
10 March 2026 — docs.x.ai, read 16 October 2026
Status
Generally available — docs.x.ai, read 16 October 2026
Takes
Text, Image — docs.x.ai, read 16 October 2026
Returns
Text — docs.x.ai, read 16 October 2026
Open weights
Not confirmed: The maker's pages reviewed do not state whether the model's weights are open or provide downloadable weights.
Licence
Not confirmed: The maker's pages reviewed do not name a licence for this model.
Context window
1,000,000 tokens — docs.x.ai, read 19 October 2026
Longest answer
Not confirmed: The model-specific page and pricing page reviewed do not print the standard maximum output-token limit.
Knowledge cutoff
Not confirmed: The maker's pages reviewed do not state a knowledge-cutoff date for Grok 4.20.
API price, input
Not confirmed: its line was not found on its page, and a second reading did not confirm it
API price, output
Not confirmed: its line was not found on its page, and a second reading did not confirm it
Where
API — docs.x.ai, read 16 October 2026
Parameters
Not confirmed: The maker's pages reviewed do not publish a parameter count for this model.
Model card
https://docs.x.ai/developers/models/grok-4.20 — docs.x.ai, read 16 October 2026

Benchmarks

Measured by others, not by the maker: each score with the name the measurer gives the model and the setting it ran, its day and its licence.

Epoch AI

Epoch AI, ‘Capabilities & benchmarking’, epoch.ai/benchmarks, CC BY 4.0: Epoch AI’s own runs and its Capabilities Index. Data · CC BY 4.0

Questions

When was Grok 4.20 released?

xAI released Grok 4.20 on 10 March 2026.

Is Grok 4.20 still available?

Yes: it is generally available, as xAI states it.

What is the context window of Grok 4.20?

The context window of Grok 4.20 is 1,000,000 tokens, as xAI prints it.

What does Grok 4.20 take and return?

Grok 4.20 takes text, image and returns text.

More from xAI

Sources

  1. Grok 4.20 (read 16 October 2026)
  2. Release Notes (read 16 October 2026)
  3. API Pricing (read 16 October 2026)
  4. Grok 4.20 (read 19 October 2026)

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