OpenAI model

o3 API

openai/o3 is the exact Model id from the catalog. It has a 200000 token context window. Walk away if you need more context than that.

Read quickstartEstimate cost
OpenAIPlatform curatedCatalog
ThinkingFunction CallingVision
Input price$2 / 1M tokens
Output price$8 / 1M tokens
Context length200k tokens
Max output8.2k tokens

What is o3 API in NextModel?

openai/o3 is the exact Model id from the catalog. It has a 200000 token context window. Walk away if you need more context than that.

O3 via NextModel: 200k-token context; $2 / 1M tokens in / $8 / 1M tokens out per 1M tokens. Capabilities: streaming, tool, json.

Best use cases

  • Call openai/o3 if your workload fits within 200000 tokens and you need vision, long-context processing, or agent use cases.
  • You need the listed capabilities on this catalog entry.
  • The listed price fits the workload better than the siblings in the same family.

When not to use

  • Do not call openai/o3 if your workload needs more than 200000 tokens of context.
  • Do not call it if you require a first-party CacheSafety score, because that score is unpublished.
  • A required number is unpublished in the catalog snapshot.

OpenAI-compatible code example

request.sh
curl https://api.nextmodel.app/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $NEXTMODEL_API_KEY" \
  -d '{"model":"openai/o3","messages":[{"role":"user","content":"Reply with OK."}]}'

Switching models only changes the model field.

Try it in the playground

Similar alternatives

OpenAICatalog

GPT-4.1

GPT-4.1 via NextModel: 1M-token context; $2 / 1M tokens in / $8 / 1M tokens out per 1M tokens. Capabilities: streaming, tool, json.

$2 / 1M tokensInput$8 / 1M tokensOutput1MContext
Best forimage understanding, multimodal chat
StreamingTool callingJSON modeVision
Platform curatedCurated and maintained in the NextModel catalog
View details
OpenAICatalog

GPT-4.1 Mini

GPT-4.1 Mini via NextModel: 1M-token context; $0.4 / 1M tokens in / $1.60 / 1M tokens out per 1M tokens. Capabilities: streaming, tool, json.

$0.4 / 1M tokensInput$1.60 / 1M tokensOutput1MContext
Best forimage understanding, multimodal chat
StreamingTool callingJSON modeVision
Platform curatedCurated and maintained in the NextModel catalog
View details
OpenAICatalog

GPT-4.1 Nano

GPT-4.1 Nano via NextModel: 1M-token context; $0.1 / 1M tokens in / $0.4 / 1M tokens out per 1M tokens. Capabilities: streaming, tool, json.

$0.1 / 1M tokensInput$0.4 / 1M tokensOutput1MContext
Best forimage understanding, multimodal chat
StreamingTool callingJSON modeVision
Platform curatedCurated and maintained in the NextModel catalog
View details

Compare O3

O3 vs GPT-4.1O3 vs GPT-4.1 MiniO3 vs GPT-4.1 NanoO3 vs GPT-4oO3 vs GPT-4o-mini

Reading

Articles that explain O3

FAQ

O3 API questions

What model id do I send for o3?

Send openai/o3 to https://api.nextmodel.app/v1 with your OpenAI SDK. If that id is missing from /v1/models, the page is stale.

What does the catalog list for price and context?

o3 is listed at $2 / 1M tokens input and $8 / 1M tokens output. Context window: 200000 tokens.

What should I treat as unverified?

Do not call openai/o3 if your workload needs more than 200000 tokens of context. Do not call it if you require a first-party CacheSafety score, because that score is unpublished.

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