Grok-4.20 Reasoning API Pricing — $2.00/M input, $6.00/M output
xAI modern flagship: state-of-the-art vision, reasoning, and document analysis.
Speed
Tokens / sec
52
TTFT
540 ms
Rank
#27 of 31
$ / M ÷ t/s
$0.06
Measured with 5 runs on a fixed prompt — see the full methodology.
Cost at scale
| Tokens / month | Est. cost (blended 3:1) |
|---|---|
| 100,000 | $0.30 |
| 1,000,000 | $3.00 |
| 10,000,000 | $30.00 |
| 100,000,000 | $300.00 |
How Grok-4.20 Reasoning compares
Grok-3 Mini — $0.26/MGrok 4.3 — $1.56/MGrok-3 — $2.50/MGrok-4.20 — $3.00/MGrok-4.20 — $3.00/MMistral Large 3 — $3.00/MQwen 3.8 Max — $2.80/M
Head-to-head comparisons
Grok-4.20 Reasoning vs Claude Opus 4.8Grok-4.20 Reasoning vs Gemini 3.1 ProGrok-4.20 Reasoning vs Grok 4.3Grok-4.20 Reasoning vs GPT-5.6 Terra
FAQ
Is Grok-4.20 Reasoning cheaper than Grok-4.20?
Grok-4.20 Reasoning costs $3.00/M blended tokens, Grok-4.20 costs $3.00/M — Grok-4.20 is cheaper.
How much does 1 million tokens cost with Grok-4.20 Reasoning?
At a 3:1 input:output ratio, 1 million blended tokens costs approximately $3.00. Pure input costs $2.00/M; pure output costs $6.00/M.
Who provides Grok-4.20 Reasoning?
Grok-4.20 Reasoning is served by xAI. Pricing was last verified on 2026-04-06 against https://docs.x.ai/docs/overview#pricing.