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o4-mini (Fast)

openai·openai/o4-mini-fast·GA·Closed·o-mini series
Fast o-series model for compact reasoning, coding, and tool use

Specs & pricing

Input / output per 1M tokens
Reference price·Vercel AI Gateway
$2.00 / $8.00
Blended $3.50 · Cache read $0.50
Lowest paid·Vercel AI GatewayCloud
$2.00 / $8.00
Blended $3.50
Context
200,000
Output limit
100,000
Knowledge cutoff
2024-05
Released / updated
2025-04-16 / 2025-04-16
Capabilities
✓ Reasoning✓ Tool use✓ Structured outputTemperature✓ Attachments
Modalities
TextImagePDF

Available at 1 providers1 with public prices

ProviderTierInputOutputCache readCache writeContextOutput limitStatus
Vercel AI GatewayCloud$2.00$8.00$0.50—200,000100,000

Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.

Reasoning control

effort = loweffort = mediumeffort = high

Your usage cost

1Vercel AI Gateway$620.00
The cheapest paid channel is the only channel.

Price historyone sample accumulated per data sync

Input list $2.00Output list $8.00Min blended $3.50

Price history accumulates from each data sync; currently only 1 sample(s) (2026-08-19). Each future sync adds a point, and once accumulated a line is drawn here.

Related models

GPT Audio Minisame series$0.60 / $2.40o4-mini (EU)same series$1.21 / $4.84o3-mini-highsame series$1.10 / $4.40GLM-5.3-Flashcheaper alternative$0.15 / $0.50DeepSeek V4.1 Flashcheaper alternative$0.15 / $0.60DeepSeek V4 Flash 0731cheaper alternative$0.45 / $1.34Qwen3.8 27Bcheaper alternative$0.80 / $4.00
Data partly from models.dev (MIT) · Vercel AI Gateway official docs ↗