Model Tracker
Grok 4
Grok 4 is an AI model made by xAI. xAI released it on 9 July 2025. It is retired. xAI retired it on 15 May 2026. It takes text, image and returns text.
Grok 4 is an AI model made by xAI. xAI released it on 9 July 2025. It is retired. xAI retired it on 15 May 2026. It takes text, image and returns text. Its context window is 256,000 tokens.
- Released
- 9 July 2025 — x.ai, read 16 October 2026
- Status
- Retired — docs.x.ai, read 16 October 2026
- Retired
- 15 May 2026 — docs.x.ai, read 16 October 2026
- Takes
- Text, Image — x.ai, read 16 October 2026
- Returns
- Text — x.ai, read 16 October 2026
- Open weights
- Not confirmed: The official pages reviewed do not state whether Grok 4 has open weights.
- Licence
- Not confirmed: The official pages reviewed do not name a licence for Grok 4.
- Context window
- 256,000 tokens — x.ai, read 16 October 2026
- Longest answer
- Not confirmed: The official pages reviewed do not print Grok 4's standard maximum output length.
- Knowledge cutoff
- Not confirmed: The official pages reviewed do not state Grok 4's knowledge cutoff.
- API price, input
- Not confirmed: The current official pricing page does not list Grok 4's standard input price; the retirement notice refers to the original model's rates without stating them.
- API price, output
- Not confirmed: The current official pricing page does not list Grok 4's standard output price; the retirement notice refers to the original model's rates without stating them.
- Where
- Not confirmed: The launch page says Grok 4 was available to subscribers and through the API, but the API retirement notice says the original model is no longer served there. The reviewed official pages do not confirm a current availability location for the retired model.
- Parameters
- Not confirmed: The official pages reviewed do not publish Grok 4's parameter count.
- Model card
- Not confirmed: No Grok 4 model card or system card is identified on the official pages reviewed.
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 Capabilities Index, Grok 4: 146.4 (144.6–148.2), as of 19 October 2026
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 released?
xAI released Grok 4 on 9 July 2025.
Is Grok 4 still available?
No: xAI retired Grok 4 on 15 May 2026.
What is the context window of Grok 4?
The context window of Grok 4 is 256,000 tokens, as xAI prints it.
What does Grok 4 take and return?
Grok 4 takes text, image and returns text.
More from xAI
- Grok 3
- Grok 3 (Think)
- Grok 3 mini
- Grok 3 mini (Think)
- Grok 4 Fast
- Grok 4 Heavy
- Grok 4.1
- Grok 4.1 Fast
- Grok 4.20
- Grok 4.20 Multi-Agent Beta
- Grok 4.3
- Grok 4.5
- Grok 4.6
- Grok 4.7
- Grok Build 0.1
- Grok Code Fast 1
- Grok Imagine Image 2.0
- Grok Imagine Video 1.5
- Grok Voice 1.0
- Grok Voice 2.0
- Grok Voice 3.0
- Grok-1
- Grok-1.5V
- Grok-2
Sources
- Grok 4 (read 16 October 2026)
- Grok Models & Pricing (read 16 October 2026)
- May 15, 2026 Model Retirement (read 16 October 2026)
- API Pricing (read 16 October 2026)