xAI
Best on the Capabilities Index Grok 4.6 156.9
xAI's models against the field
Every model on the Epoch Capabilities Index by release date, with xAI's in color.
Its strongest models
xAI Aug 2026
Grok 4.6
Closed weights Flagship
156.9
#27 of 271
Epoch Capabilities Index
- DeepSWE 67.5% #9 /28
- Terminal-Bench 4.0 20.3% #16 /23
- ZeroBench 17% #18 /66
xAI Sep 2026
Grok 4.7
Closed weights Flagship
154.6
#43 of 271
Epoch Capabilities Index
- Terminal-Bench 4.0 37.6% #10 /23
- HealthBench Professional 56.7% #20 /25
- Harvey LAB (Legal Agent Benchmark) 12.5% #13 /80
xAI Jul 2026
Grok 4.5
Closed weights Flagship
154.4
#44 of 271
Epoch Capabilities Index
- DeepSWE 53.8% #19 /28
- Terminal-Bench 4.0 12.4% #22 /23
- τ³-bench Banking 47.9% #3 /25
xAI Feb 2026
Grok 4.20
Closed weights
152.3
#51 of 271
Epoch Capabilities Index
- Terminal-Bench 2.0 57.3% #14 /43
- ZeroBench 10% #29 /66
- Harvey LAB (Legal Agent Benchmark) 0% #66 /80
xAI Apr 2026
Grok 4.3 Beta
Closed weights
148.9
#68 of 271
Epoch Capabilities Index
- CritPt 8.00% #64 /160
- GDP.pdf 8.00% #38 /39
- GPQA Diamond 88.8% #50 /219
xAI Jul 2025
Grok 4
Closed weights
146.3
#80 of 271
Epoch Capabilities Index
- Terminal-Bench 2.0 27.2% #34 /43
- Toolathlon 27.5% #34 /50
- ZeroBench 6.00% #39 /66
What its model cards measure
Tall ticks are xAI model cards that list the benchmark in their headline table. Gray dots are cards that leave it out. Rows are the benchmarks the lab listed most, at least twice each, in the order it started using them.
Model cards
| Date | Model | Document | Benchmarks |
|---|---|---|---|
| 14 Oct 2026 | Grok Voice 3.0 | Introducing Grok Voice 3.0 (xAI news) | 2 |
| 21 Sep 2026 | Grok 4.7 | Introducing Grok 4.7 | 8 |
| 12 Aug 2026 | Grok 4.6 | Introducing Grok 4.6 | 10 |
| 29 Jul 2026 | Grok Voice 2.0 | Introducing Grok Voice 2.0 (xAI news) | 2 |
| 16 Jul 2026 | Grok 4.5 | Introducing Grok 4.5 | 4 |
| 23 Apr 2026 | Grok Voice Think Fast 1.0 | Grok Voice Think Fast 1.0 (xAI news) | 1 |
| 19 Nov 2025 | Grok 4.1 Fast | Grok 4.1 Fast and Agent Tools API (xAI news) | 5 |
| 17 Nov 2025 | Grok 4.1 | Grok 4.1 | 4 |
| 19 Sep 2025 | Grok 4 Fast | Grok 4 Fast (xAI news) | 12 |
| 28 Aug 2025 | grok-code-fast-1 | Grok Code Fast 1 (xAI news) | 1 |
| 9 Jul 2025 | Grok 4 | Grok 4 (xAI news) | 8 |
| 9 Jul 2025 | Grok 4 Heavy | Grok 4 | 6 |
| 19 Feb 2025 | Grok-3 mini | Grok 3 Beta: The Age of Reasoning Agents (xAI news) | 9 |
| 19 Feb 2025 | Grok 3 | Grok 3 Beta — The Age of Reasoning Agents | 10 |
| 13 Aug 2024 | Grok-2 Aug 2024 | Grok-2 Beta Release | 9 |
| 28 Mar 2024 | Grok-1.5 | Announcing Grok-1.5 | 4 |
| 3 Nov 2023 | Grok-1 | Announcing Grok | 5 |
Every xAI model
- Grok Voice 3.0 Oct 2026
- Grok 4.7 Sep 2026
- Grok 4.6 Aug 2026
- Grok Voice 2.0 Jul 2026
- Grok 4.5 Jul 2026
- Grok Build 0.1 May 2026
- Grok 4.3 Apr 2026
- Grok Voice Think Fast 1.0 Apr 2026
- Grok 4.3 Beta Apr 2026
- Grok 4.20 Multi-agent Mar 2026
- Grok 4.20 Feb 2026
- Grok 4.1 Fast Nov 2025
- Grok 4.1 Nov 2025
- Grok 4 Fast Sep 2025
- Grok 4 Heavy Jul 2025
- Grok 4 Jul 2025
- Grok 3 Apr 2025
- Grok-3 mini Apr 2025
- Grok-2 Dec 2024 Dec 2024
- Grok 2 Vision (1212) Dec 2024
- Grok-2 Aug 2024 Aug 2024
- Grok-2 mini Aug 2024
- Grok-1.5 Mar 2024
- Grok-1 Nov 2023
- Grok Imagine Video