OpenAI: GPT-5 Mini vs Grok 3 mini
Grok 3 mini is cheaper than OpenAI: GPT-5 Mini by about 27% on a blended (75% input / 25% output) basis. OpenAI: GPT-5 Mini charges $0.250000 / $2.000000 per 1M input/output tokens; Grok 3 mini charges $0.250000 / $1.270000.
| Field | OpenAI: GPT-5 Mini | Grok 3 mini |
|---|---|---|
| Input $/Mtok | $0.250000 | $0.250000 |
| Output $/Mtok | $2.000000 | $1.270000 |
| Cache read $/Mtok | $0.025000 | – |
| Cache write $/Mtok | – | – |
| Input $/Mchar | 0.070428 | n/a |
| Output $/Mchar | 0.563428 | n/a |
| Context window | 400000 | 131072 |
| Tokenizer | o200k | – |
Price history
Same workload, monthly cost
Illustrative monthly cost at 10M tokens/month, split per workload preset. Not a substitute for the calculator, which uses your own volume, cache and batch assumptions.
| Workload | OpenAI: GPT-5 Mini | Grok 3 mini |
|---|---|---|
| Coding agent | $3.38 | $3.01 |
| RAG chat | $5.13 | $4.03 |
| Summarisation (batch) | $4.25 | $3.52 |
| Classification | $2.85 | $2.70 |
| Chat assistant | $9.50 | $6.58 |
| Content generation | $16.50 | $10.66 |
Cite this page
OpenAI: GPT-5 Mini vs Grok 3 mini: $0.250000/$2.000000 vs $0.250000/$1.270000 per 1M tokens, as of 2026-10-04 (Token Barometer, https://tokenbarometer.com/compare/openai_gpt-5-mini-vs-xai_grok-3-mini).
OpenAI: GPT-5 Mini page | Grok 3 mini page | Open in calculator