o3

o3 costs $2.00 per 1M input tokens, $0.50 cached input and $8.00 per 1M output tokens. Batch API: $1.00 input, $4.00 output.

Updated October 16, 2026

Input / 1M

$2.00

Output / 1M

$8.00

Cached Input

$0.50

Context Window

200K

Standard Input

$2.00 / 1M

Base prompt input rate

Standard Output

$8.00 / 1M

Completion output rate

Prompt Caching -50%

$0.50 / 1M

Cached prompt context

Batch API -50%

$1.00 / 1M

Asynchronous 24h batch

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All rates listed in USD per 1 Million (1M) tokens unless noted

StandardBatchFlexFast mode

Pricing Metric / Parameter	Standard RATE (per 1M)	Batch RATE (per 1M)	Flex RATE (per 1M)	Fast mode RATE (per 1M)
Short context input	$2.00	$1.00	$1.00	$3.50
Short context cached input	$0.50	-	$0.25	$0.875
Short context cache writes	-	-	-	-
Short context output	$8.00	$4.00	$4.00	$14.00
Long context input	-	-	-	-
Long context cached input	-	-	-	-
Long context cache writes	-	-	-	-
Long context output	-	-	-	-

Source: OpenAI official pricing page, verified 2026-10-16. Prices in USD per 1M tokens.

AI / LLM

LLM API Cost Comparison

Use our free LLM Cost Calculator to benchmark o3 token rates, Batch API discounts, and monthly estimated spend side-by-side with leading AI models.