- Score
- 9.4 (+3.10 points)
- Total Cost (Current Price)
- $0.183 · 85.4% cheaper
- Response Time (avg)
- 6.24s · 83.0% faster
X AI
Release: 2026-03-31
Tested on: 2026-10-01 02:39
x-ai/grok-4.20::medium
~1T total (~100B active)MoEClosedEstimated
(medium)
(none)
Summary
Grok 4.20 scores 6.3 on AI BENCHY and ranks #225. It has 10.0 reliability, a 58.0% pass rate, $1.246 total cost, and 36.73s average response time.
What makes Grok 4.20 unique: It stands out most in Combined, where it ranks #2, while General Intelligence is its weakest area at #14.
Identity note
Grok 4.20 Beta was the preview version of Grok 4.20.
Recommended alternatives
We recommend choosing one of these models instead:
- Score
- 8.3 (+2.01 points)
- Total Cost (Current Price)
- $0.047 · 96.2% cheaper
- Response Time (avg)
- 18.07s · 50.8% faster
- Score
- 7.4 (+1.16 points)
- Total Cost (Current Price)
- $0.065 · 94.8% cheaper
- Response Time (avg)
- 9.64s · 73.8% faster
Model facts
Researched on 2026-08-12
- Parameters
- ~1T total (~100B active)
- Architecture
- MoE
- Availability
- Closed
- License
- -
Best estimate from public evidence; the vendor did not disclose every value. xAI does not disclose the architecture or count.
6.3
Consistency
8.2
10.0
Total Output Tokens
302,087
Total Input Tokens
392,127
Input Price
$1.250 / 1M
Output Price
$2.500 / 1M
Cache Read Price
$0.200 / 1M
Cache Write Price
N/A
Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.
Flaky tests
5
Flaky tests had mixed outcomes across runs (at least one pass and one fail).
Hamster playing table tennis
Prompt: Create a detailed SVG illustration of a hamster playing table tennis.
#225 SpaceXAI: Grok 4.20
medium- Cost
- $0.041
- Time
- 110.3s
- Tokens
- 16,336 tok
Run history
| Tested on | Score | Reliability | Tests Correct | Total Cost | Compare |
|---|---|---|---|---|---|
| 2026-10-01 02:39 Re-test | 6.3 | 10.0 | $1.246 ↓ | Current run | |
| 2026-07-16 23:07 New test added | 7.1 | 10.0 | $0.777 ↓ | Compare | |
| 2026-06-04 14:17 New test added | 7.1 | 10.0 | $0.609 ↓ | Compare | |
| 2026-05-22 00:32 Suite changed | 6.7 | 10.0 | $0.832 | Compare | |
| 2026-05-08 15:32 Suite changed | 6.9 | 10.0 | $0.756 | Compare | |
| 2026-04-11 01:44 First recorded run | 7.0 | N/A | $0.743 | Compare |
This run used a different benchmark suite. Keep suite changes in mind when reading historical movement.
Run comparison
| Run | Benchmark coverage | Score | Consistency | Reliability | Tests Correct | Flaky tests | Total Output Tokens | Total Input Tokens | Total Cost | Response Time (avg) |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026-10-01 02:39 · Current run | 69/69 attempts | 6.3 | 8.2 | 10.0 | 11/23 | 5 | 302,087 | 392,127 | $1.246 | 36.73s |
| 2026-05-08 15:32 · Suite changed | 57/57 attempts | 6.9 | 8.3 | 10.0 | 10/19 | 4 | 130,017 | 0 | $0.756 | 14.53s |
| Difference | — | -0.6 | -0.1 | 0.0 | +1 | +1 | +172070 | +392127 | +$0.490 | +22196ms |
Benchmark coverage differs: 69/69 attempts (Target: 3 repeats per test) versus 57/57 attempts (Target: 3 repeats per test). Totals and repeat-sensitive metrics are not directly comparable.
These two runs used different benchmark suites, so the deltas reflect both model changes and suite changes.
Price History
Historical pricing data for this model from OpenRouter.
| Date | Input Price | Output Price | Cache Read Price | Cache Write Price |
|---|---|---|---|---|
| 2026-08-14 12:51 | $1.250 / 1M | $2.500 / 1M | N/A | N/A |
| 2026-10-01 18:33 | $1.250 / 1M | $2.500 / 1M | $0.200 / 1M | N/A |
Charts
Choose the first model, then click a second model to open a side-by-side page.
Top Models by Score
Score vs Total Cost
Response Time (avg)
Score vs Response Time (avg)
Total Output Tokens
Score vs Total Output Tokens
Quick Compare
Grok 4.20mediumvsDeepSeek V4 Flash 0423noneGrok 4.20mediumvsSpace Bunny AlphaxhighGrok 4.20mediumvsTrinity Large ThinkinglowGrok 4.20mediumvsKAT-Coder-Pro V2.5mediumGrok 4.20mediumvsDeepSeek V3.2mediumGrok 4.20mediumvsDeepSeek V4 Flash 0731noneGrok 4.20mediumvsSpace Bunny AlphamediumGrok 4.20mediumvsGemini 3.1 Flash Lite PreviewnoneGrok 4.20mediumvsQwen3.5 Plus 2026-02-15noneGrok 4.20mediumvsClaude Fable 5.1low
Category Breakdown
| Category | Score | Consistency | Tests Correct |
|---|---|---|---|
| Agentic | 3.0 | 10.0 | |
| Anti-AI Tricks | 8.2 | 7.9 | |
| Coding | 6.3 | 6.6 | |
| Combined | 8.7 | 6.9 | |
| Data parsing and extraction | 10.0 | 10.0 | |
| Domain specific | 2.9 | 7.2 | |
| General Intelligence | 3.9 | 2.6 | |
| Instructions following | 9.8 | 10.0 | |
| Puzzle Solving | 7.7 | 10.0 | |
| Tool Calling | 3.0 | 10.0 | |
| Trivia | 3.0 | 10.0 |