o3
o3Alternatives?
CheaperGrok 4.7unstated+32%-14%$2 / $6Reasoning cannot be disabled+4
BetterClaude Opus 5unstated+38%+186%$5 / $25
OpenGLM 5.3unstated+30%-39%$1.40 / $4.40No image input+4
CheaperMuse Spark 1.3unstated+32%-43%$1.25 / $4.25Only auto tool_choice is supported+5CheaperMuse Spark 1.2unstated+30%-43%$1.25 / $4.25Only auto tool_choice is supported+1Grok 4.7unstated+32%-14%$2 / $6Reasoning cannot be disabled+4Muse Spark 1.3unstated+32%-43%$1.25 / $4.25Only auto tool_choice is supported+5GLM 5.3unstatedOpen+30%-39%$1.40 / $4.40No image input+4Muse Spark 1.2unstated+30%-43%$1.25 / $4.25Only auto tool_choice is supported+1
Kimi K2.6unstatedOpen+25%-51%$0.95 / $4Claude Opus 5unstated+38%+186%$5 / $25Claude Fable 5.1unstated+36%+471%$10 / $50Replace forced tool_choice+5Claude Opus 5.5unstated+35%+129%$4 / $20No forced tool use+5Claude Fable 5unstated+32%+471%$10 / $50Grok 4.7unstated+32%-14%$2 / $6Reasoning cannot be disabled+4GLM 5.3unstatedOpen+30%-39%$1.40 / $4.40No image input+4Kimi K3unstatedOpen+27%+71%$3 / $15Sampling parameters are fixed+3Kimi K2.6unstatedOpen+25%-51%$0.95 / $4GLM 5.2unstatedOpen+24%-39%$1.40 / $4.40No image input
DeepSeek V4 Pro 0813unstatedOpen+21%-43%$1.32 / $3.96No image input+5GPT-6 Solunstated+32%—$2 / $10GPT-6 Astraunstated+32%—$10 / $50Monitoring can return HTTP 403+2GPT-5.6 Solunstated+30%—$4 / $20GPT-5.4unstated+25%—$2.50 / $15GPT-5.5unstated+25%—$5 / $30Prompts with >272K input tokensGPT-5.6 Terraunstated+24%—$2 / $12Prompts with >272K input tokensGPT-5.6 Lunaunstated+20%—$0.20 / $1.20GPT-5.4 Miniunstated+16%—$0.75 / $4.50All OpenAI models →Benchmarks
in Writing & LanguageFAQ
How much does o3 cost?›
$2 per 1M input tokens and $8 per 1M output tokens; cached input $0.50 per 1M.
Is o3 free to use?›
There is no free API; the cheapest paid price is $2 per 1M input tokens.
How good is o3, and what is it best at?›
#125 of 336 in Chat & Knowledge, #38 of 239 in Coding, #76 of 242 in Agents & Tool Use, #93 of 197 in Writing & Language, #69 of 125 in Vision & Documents. Strongest at: Instructions.
Is o3 better than Kimi K2 0905?›
On EQ-Bench Longform Creative Writing 1.11, o3 scores 62.7 vs 63.8 — lower.
How can I use o3?›
Through the API of OpenAI.
What is the context window of o3?›
200K tokens, with up to 100K output tokens.
When was o3 released? Is there a newer version?›
Released 2025-04-16. It is the current version in its line.
Is o3 open source?›
No, o3 is a closed model available through an API. The closest open-weights option here is GLM 5.3.
Can o3 read images?›
It accepts text and images, PDF files as input.
What is o3?›
o3 is a closed language model from OpenAI, released Apr 2025, the successor to o1.
What are the best alternatives to o3?›
Grok 4.7 (cheaper), Claude Opus 5 (better), GLM 5.3 (open weights).