Grok 4.20
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
Input / 1M
$1.25
Output / 1M
$2.50
Context
2M
AA Intelligence
25.7
Closed weights — available only as a hosted API
text + image + file → text
Knowledge cutoff Sep 2025
View on OpenRouter ↗
Pricing
via OpenRouter · USD per 1M tokens · synced 2026-10-24$1.25
input / 1M
$2.50
output / 1M
$0.20
cached input / 1M
$3.75
1M in + 1M out
Price tiers
- Above 200K prompt tokens: input $2.50/M, output $5.00/M (2× base)
- Context window
- 2,000,000 tokens
- Max output
- 1,800,000 tokens
- Providers
- 1
- Cheapest provider
- xAI · $1.25 / $2.50
- Best throughput
- —
- AA Intelligence / Coding / Agentic
- 25.7 / — / —
✓ Tool calling
✓ Reasoning
✓ Structured outputs
✓ Image input
✓ File input
✗ Audio input
✓ Prompt caching
Price history
tracking started — chart appears after 7 days of snapshots (6 recorded)Current: $1.25 input · $2.50 output per 1M tokens
Benchmarks
Third-party indices as published through OpenRouter — Artificial Analysis and Design Arena. Not measured by us.
- AA Intelligence Index
- 25.7
- AA Coding Index
- —
- AA Agentic Index
- —
Design Arena
CategoryEloWin %Rank
androidnative
1047
35%
#36
fullstack
1054
41.1%
#34
godotgamedev
1089
38.5%
#31
htmlslides
1180
45.7%
#3
mobileapps
1090
45.4%
#43
webapps
1144
49.7%
#31
3d
1193
52.1%
#52
asciiart
1175
48.2%
#30
codecategories
1220
51.8%
#54
dataviz
1217
52%
#53
gamedev
1193
50.1%
#60
svg
1165
52.4%
#40
uicomponent
1197
49%
#60
website
1229
51.8%
#54
Providers
1 provider · per 1M tokens · last 30 min metrics| Provider | Quant | Context | Input | Output | Uptime | Tok/s |
|---|---|---|---|---|---|---|
| xAI | unknown | 2M | $1.25 | $2.50 | 100% | — |
| xAI | unknown | 2M | $1.25 | $2.50 | 100% | — |
| xAI | unknown | 2M | $2.50 | $5.00 | — | — |
| xAI | unknown | 2M | $2.50 | $5.00 | 100% | — |
Provider data from OpenRouter's endpoint listing, refreshed daily.
Specifications
- Organisation
- x-ai
- Released on OpenRouter
- 2026-03-31
- Context window
- 2,000,000 tokens
- Max output
- 1,800,000 tokens
- Input
- text, image, file
- Output
- text
- Knowledge cutoff
- September 2025
- Tokenizer
- Grok
- Moderated by provider
- No
- OpenRouter id
- x-ai/grok-4.20
Compare with
Popular comparisons
Prices, context and providers from the public OpenRouter API, snapshotted daily; benchmark indices from Artificial Analysis. See /methodology.