Models/OpenAI/o3

o3

Name: o3 API access
Brand: OpenAI

OpenAI · Proprietary · Released Apr 16, 2025 · openai/o3

Best $2.00 in / $8.00 out via OpenAI

Compare Estimate cost

200K contextVisionToolsReasoningStructured outputPrompt caching

Available from 1 providerUSD / MTOK · PRICES 23 MINUTES AGO · SPEED 19 DAYS AGO

EST. MONTHLY COSTclick a row for detail · click headers to sort

PROVIDER	INPUT	OUTPUT	CACHE	CONTEXT	QUANT	TTFT	TPS	UPTIME
OpenAI1ST PARTY	$2.00	$8.00	$0.50	200K	—	2.2s	116 tok/s	100.0%

TTFT/TPS: median (P50) over trailing 504h · chat10k profile (~10K in / 200 out) · measured via OpenRouter routing · methodology v1.1 · measured 19 days ago

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Quality benchmarksCURATED AUG 24, 2026

LMArena Elo1431INDEPENDENTEntry: o3-2025-04-16 (rank 95)source ↗ 2026-08-21

Third-party reported results, hand-curated with sources — not measured by ModelIndex. Our own measured serving data (TTFT/TPS/SMOKE) is in the providers table above.

Pricing variants · USD / MTok in / out

STANDARD

$2.00 / $8.00

per MTok in / out

BATCH

$1.00 / $4.00

async batch

CACHE READ $0.50WEB SEARCH $0.01 / search

About

o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following....

Specifications

Context window200,000

Max output100,000

Modalities inimage, text, file

Modalities outtext

LicenseProprietary

ReleasedApr 16, 2025

Knowledge cutoff2024-06-30

TokenizerGPT

GPT-6.1 Sol Pro$2.00 / $10.00 GPT-6.1 Sol$2.00 / $10.00 GPT-6 Luna Pro$0.10 / $0.50 GPT-6 Luna$0.10 / $0.50

Embed badge

[![o3](https://modelindex.ai/badge/openai/o3)](https://modelindex.ai/models/openai/o3)

Sources

OpenRouter API23 minutes ago

AGGREGATOR

LiteLLM dataset23 minutes ago

AGGREGATOR

ModelIndex benchmarks19 days ago

MEASURED

Verified 23 minutes ago · list prices, not negotiated rates.