Grok 4.3 API pricing
As of October 22, 2026, SpaceXAI Grok 4.3 costs $1.25 per million input tokens and $2.50 per million output tokens on xAI's own API, 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 window1M tokens
- Max output900K 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 | $0.31 | $310.00 |
Price history
We have read xAI's own price every day since October 21, 2026. It has not changed yet; any change will be listed here with its date.
- October 21, 2026 First recorded: $1.25 input, $2.50 output
Cheaper models as good as Grok 4.3
Models within two points of Grok 4.3 or above it on the LLMBenchmark Index, with a lower output price. Cheapest first.
- MiMo-V2.6-Flash$0.28 Overall 60.8 against 53.1 · 89% cheaper output
- DeepSeek V4 Flash 0731$0.396 Overall 55.2 against 53.1 · 84% cheaper output
- Claude Haiku 5.5$0.50 Overall 67.6 against 53.1 · 80% cheaper output
- GLM 5.3 Flash$0.50 Overall 66.0 against 53.1 · 80% cheaper output
- GPT-6 Luna$0.50 Overall 59.7 against 53.1 · 80% cheaper output
Grok 4.3 pricing questions
- How much does Grok 4.3 cost per million tokens?
- $1.25 per million input tokens and $2.50 per million output tokens, as listed on OpenRouter on October 22, 2026.
- Does Grok 4.3 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 4.3?
- MiMo-V2.6-Flash scores 60.8 on the LLMBenchmark Index, within two points of Grok 4.3 or above it, and costs $0.28 per million output tokens.
- Has the price of Grok 4.3 changed?
- Not since we started recording it daily on October 21, 2026.