Grok 4.20 API pricing
As of October 21, 2026, SpaceXAI Grok 4.20 costs $1.25 per million input tokens and $2.50 per million output tokens through OpenRouter, with cached input at $0.20 per million.
- Input, per million tokens$1.25
- Output, per million tokens$2.50
- Cached input, per million$0.20
- Context window2M tokens
- Max output1.8M tokens
- Output speedNot measured
What a request costs
Three fixed token mixes at the list price, without cache or batch discounts. For a whole month, use the calculator.
| Workload | Tokens | One request | 1,000 requests | Fits the context window |
|---|---|---|---|---|
| Chat turn | 1K input + 500 output tokens | $0.0025 | $2.50 | Yes |
| Repository review | 50K input + 3K output tokens | $0.070 | $70.00 | Yes |
| Agent loop | 200K input + 10K output tokens | $0.275 | $275.00 | Yes |
| Solved coding task | One SWE-bench Verified attempt, divided by the share that succeed | $0.72 | $720.00 |
Price history
We read this price every day and have since October 15, 2026. It has not changed yet; any change will be listed here with its date.
- October 15, 2026 First recorded: $1.25 input, $2.50 output
Cheaper models as good as Grok 4.20
Models within two points of Grok 4.20 or above it on the Artificial Analysis Intelligence Index, with a lower output price. Cheapest first.
- Ling 3.0 Flash VL$0.18 Overall 24.6 against 25.7 · 93% cheaper output
- DeepSeek V4 Flash 0423$0.182 Overall 24.4 against 25.7 · 93% cheaper output
- Solar Mini 4$0.20 Overall 24.1 against 25.7 · 92% cheaper output
- Ling 3.1 Flash$0.225 Overall 41.1 against 25.7 · 91% cheaper output
- MiMo-V2.6-Flash$0.28 Overall 37.9 against 25.7 · 89% cheaper output
Grok 4.20 pricing questions
- How much does Grok 4.20 cost per million tokens?
- $1.25 per million input tokens and $2.50 per million output tokens, as listed on OpenRouter on October 21, 2026.
- Does Grok 4.20 support prompt caching?
- Yes. OpenRouter lists cached input at $0.20 per million tokens, against $1.25 for uncached input.
- Is there a cheaper model as good as Grok 4.20?
- Ling 3.0 Flash VL scores 24.6 on the Artificial Analysis Intelligence Index, within two points of Grok 4.20 or above it, and costs $0.18 per million output tokens.
- Has the price of Grok 4.20 changed?
- Not since we started recording it daily on October 15, 2026.