Grok 4.20
xAI · Proprietary · Released Mar 31, 2026 · x-ai/grok-4.20
2M contextVisionToolsReasoningStructured outputPrompt caching
Available from 4 providersUSD / MTOK · VERIFIED 4 MINUTES AGO
EST. MONTHLY COSTclick a row for detail · click headers to sort
| PROVIDER | INPUT | OUTPUT | CACHE | CONTEXT | QUANT | TTFT | TPS | UPTIME |
|---|---|---|---|---|---|---|---|---|
 xAI1ST PARTY | $1.25 | $2.50 | $0.20 | 2M | — | 0.65s | 106 tok/s | 100.0% |
| xAI1ST PARTY | $1.25 | $2.50 | $0.20 | 2M | — | — | — | 99.9% |
| xAI1ST PARTY | $2.50 | $5.00 | $0.40 | 2M | — | — | — | 100.0% |
| xAI1ST PARTY | $2.50 | $5.00 | $0.40 | 2M | — | — | — | 99.9% |
TTFT/TPS: median (P50) over trailing 72h · chat10k profile (~10K in / 200 out) · measured via OpenRouter routing · methodology v1.1 · measured 43 hours ago
Pricing variants · USD / MTok in / out
STANDARD
$1.25 / $2.50
per MTok in / out
CACHE READ $0.20WEB SEARCH $0.005 / search
About
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...
Specifications
Context window2,000,000
Max output—
Modalities intext, image, file
Modalities outtext
LicenseProprietary
ReleasedMar 31, 2026
Knowledge cutoff2025-09-01
TokenizerGrok
Embed badge
[](https://modelindex.ai/models/x-ai/grok-4.20)Sources
OpenRouter API4 minutes ago
AGGREGATORModelIndex benchmarks43 hours ago
MEASUREDVerified 4 minutes ago · list prices, not negotiated rates.