o3
o3Alternatives?
CheaperMiniMax M3.1 Flashthinking+46%-93%$0.22Complete model response must be appendedBetterGPT-6 Lunalow+6%-94%$0.005Function calling only with none · Chat Completions+3
OpenDeepSeek V4 Pro 0813max+27%-43%$0.67No image input+5
CheaperGemini 3.8 Flashhigh+42%-57%*$1.24Sampling parameters are ignored+1CheaperGemini 3 Flash Previewthinking+39%-68%$0.50 / $3MiniMax M3.1 Flashthinking+46%-93%$0.22Complete model response must be appendedGemini 3.8 Flashhigh+42%-57%*$1.24Sampling parameters are ignored+1Gemini 3 Flash Previewthinking+39%-68%$0.50 / $3
Muse Spark 1.1xhigh+35%-43%$1.38Only n=1 · Meta / Chat Completions+1
Grok 4.5high+34%-14%$0.88GPT-6 Lunalow+6%-94%$0.005Function calling only with none · Chat Completions+3GPT-5.6 Lunamedium+6%-87%$0.016GPT-6.1 Sollow+53%+14%$0.13Remove unsupported parameters+5GPT-6 Sollow+33%+14%$0.13GPT-5.6 Terralow+13%+29%$0.14Prompts with >272K input tokensDeepSeek V4 Pro 0813maxOpen+27%-43%$0.67No image input+5
Kimi K3maxOpen+23%+71%$2.00Sampling parameters are fixed+3DeepSeek V4.1 Flash 1017maxOpen+11%-85%$0.26Pass back reasoning_content · Chat Completions+4TInklingxhighOpen+8%-51%$0.95 / $4.05No strict JSON
Step 5 PreviewthinkingOpen+8%-59%$1.03web_search not available · Chat Completions+2GPT-6 Astramedium+57%—$1.54Monitoring can return HTTP 403+2GPT-6.1 Solmedium+57%—$0.21Remove unsupported parameters+5GPT-5.6 Solmedium+50%—$0.50GPT-5.5medium+47%—$0.90Prompts with >272K input tokensGPT-6 Solmedium+39%—$0.25GPT-5.3 Codexxhigh+37%—$1.75 / $14DeprecatedGPT-5.5 Instant (May 2026)+20%——GPT-5.6 Terramedium+16%—$0.18Prompts with >272K input tokensAll OpenAI models →History
3 versionsBenchmarks
in Chat & KnowledgeFAQ
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?›
#123 of 334 in Chat & Knowledge, #38 of 239 in Coding, #76 of 242 in Agents & Tool Use, #81 of 195 in Writing & Language, #68 of 124 in Vision & Documents. Strongest at: Instructions.
Is o3 better than o1?›
On AA Omniscience · Accuracy, o3 scores 38.6 vs 34.5 — higher.
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 DeepSeek V4 Pro 0813.
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?›
MiniMax M3.1 Flash (cheaper), GPT-6 Luna (better), DeepSeek V4 Pro 0813 (open weights).