Grok 4.3 API pricing per million tokens
Grok 4.3 costs $1.25 per million input tokens and $2.50 per million output, with a 1M context window. Grok has a free plan and paid plans from $8/mo (Plus); the plan list does not name Grok 4.3.
AIGROW credit covers Claude Opus 5.5, Claude Fable 5.2, Claude Fable 5.1, GPT-6 Astra, Claude Sonnet 5.5, GPT-6.1 Sol, GPT-6.1 Terra, Grok 4.7 and Gemini 4 Argon. Grok 4.7 below list price
$25 a month brings $110 of API credit and cancels any time; $25 once buys $100. US dollars per million tokens, standard rate, shortest context band. Plan prices read 22 October 2026. Number 95 of 421 on LMArena’s blind votes, published 9 November 2026.
- 1,000 support replies
- $4.75
- Cached input
- $0.20
- Context window
- 1,000,000 tokens
- Released
- Not published
- Weights
- Closed weights
From xAI’s own pages, 12 November 2026.
Grok 4.3 costs $1.25 per million input tokens and $2.50 per million output tokens on xAI’s own API, and $0.20 for cached input. At those prices 1,000 support replies cost $4.75, the 22nd cheapest of 49 priced models on our list.
AIGROW API credit per million input / output tokens: Claude Opus 5.5 $1.60 / $8.00, Claude Fable 5.2 $3.20 / $16.00, Claude Fable 5.1 $4.00 / $20.00, GPT-6 Astra $2.50 / $12.50, Claude Sonnet 5.5 $0.80 / $4.00, GPT-6.1 Sol $0.50 / $2.50, GPT-6.1 Terra $0.25 / $1.25, Grok 4.7 $0.50 / $1.50 and Gemini 4 Argon $1.00 / $5.00. That is up to 75% below list price. See API credit
What a job costs
Three jobs, 1,000 runs of each, at the list price above, and where each puts Grok 4.3 among the 49 models with a list price.
| Job | 1,000 runs | Among 49 |
|---|---|---|
| Support reply3,000 in, 400 out. | $4.75 | 22nd cheapest |
| Document summary25,000 in, 1,000 out. | $33.75 | 24th cheapest |
| Agent task80,000 in (70,000 cached), 3,000 out. | $34.00 | 23rd cheapest |
The token counts are ours, chosen to look like real work; the prices are xAI’s. All three jobs stay under 100,000 tokens a request, below every long-context surcharge on the list.
Grok 4.3 on real small-business tasks
What the AIGROW benchmark measured when Grok 4.3 was given 20 office tasks, each marked pass or fail by fixed checks.
- Success rate
- 80% of 20 runs passed (95% interval 58 to 92%), 18th of 36 models.
- Cost per 1,000 passes
- $4.10, failed runs included.
- Answer time
- 7.4 s median, 9.7 s at the 90th percentile.
- Strongest and weakest
- Appointment scheduling (100% passed) and review replies (0%).
The small print
What the base rate above leaves out, copied from the maker’s pages: surcharges, discounts, promotions and cache pricing.
Prompts of 200K tokens or more: $2.50 / $5, cached $0.40. Batch 20% off. xAI no longer lists 'fast' variants; this is its low-cost model. Release date not stated on the official pages.
Grok 4.3 against the models it is weighed with
Each comparison puts both list prices side by side and costs the same three jobs on each.
- vs Gemini 3.8 Flash
- xAI's low-cost model against Google's mid tier, with cheaper output on the Grok side.
- vs DeepSeek V4.1 Flash
- xAI's cheapest model against DeepSeek's, for teams comparing low-cost options outside OpenAI and Google.
Other xAI models
| Model | Input | Output | Context | 1,000 replies |
|---|---|---|---|---|
| Grok 4.7xAI | $2.00 | $6.00 | 500K | $8.40 |
Where the price comes from
Read on 12 November 2026. Each price is the standard rate for the shortest context band, with no batch or priority discount; long-context surcharges, batch rates and promotions are in each model’s small print. No price was taken from a reseller.
Compare Grok 4.3 with 53 other models
The price list sets every model’s input and output price side by side, with what a support reply, a document summary and an agent task cost on each.
Prices checked 12 November 2026 · See them by release date