Grok 3 Mini Fast API pricing
Published on-demand rates for xAI's xai/grok-3-mini-fast, captured 2026-08-10 from public pricing data and committed to our archive. Context window 131k tokens; first observed in our archive 2025-06-16.
| Meter | USD per 1M tokens |
|---|---|
| Input | $0.600 |
| Output | $4.00 |
| Cached input | $0.150 |
Standard on-demand rates. Excludes batch endpoints and negotiated pricing; confirm on xAI's pricing page before committing.
What it costs on a real workload
The four frozen profiles the LLMPrice indices price, per 1M tokens processed, at the rates above. Where no cache-read rate is published, the whole input bills at the standard rate.
| Profile | In / out mix | Cached share | Cost |
|---|---|---|---|
| Retrieval | 800k / 200k | 70% | $1.03 |
| Chat | 500k / 500k | 30% | $2.23 |
| Content | 200k / 800k | 20% | $3.30 |
| Agent | 900k / 100k | 85% | $0.596 |
Profile definitions are frozen and published on the methodology page. Compare every model on these profiles →
Observed rate history
| Observed | Input | Output | Cached input | |
|---|---|---|---|---|
| 2025-06-16 | $0.600 | $4.00 | — | entered our archive |
| 2026-02-01 | $0.600 | $4.00 | $0.150 | repricing observed |
Dates are when we observed the rate in our own snapshots, which can lag the provider's announcement. Rates per 1M tokens.
Priced near this one
The models closest to Grok 3 Mini Fast on a retrieval workload, cheaper and more expensive alike. We publish no quality score, so this is what they cost and nothing more.
| Model | Provider | Input | Output | vs Grok 3 Mini Fast |
|---|---|---|---|---|
| Sonar | Perplexity | $1.00 | $1.00 | 3% less |
| GPT 5.4 Mini | OpenAI | $0.750 | $4.50 | 9% more |
| Grok 4.3 | xAI | $1.25 | $2.50 | 11% less |
| Claude Haiku 4.5 | Anthropic | $1.00 | $5.00 | 26% more |
Compared on the retrieval profile: 800k input, 200k output, 70% of input cached where the model offers a cache rate.
No affiliate or referral arrangements: the console link carries no parameters and nothing on this page is paid placement. Grok 3 Mini Fast is a trademark of its owner; LLMPrice.io is independent and unaffiliated.