LMFinder
O

o3

Reviewed 2026-06-27
OpenAIopenai/o3
Context
200K
Price
$2/$8
Tooling
4/5
Deploy
Cloud API

Best for

  • Agentic workflows and tool calling
  • Writing and editing code
  • Complex reasoning and analysis
  • Long documents (~200K context)

Skip if

  • You need open weights to self-host

Capability scores

Tool calling4/5
Multi-step reasoning5/5

Specifications

Context window
200K tokens
VRAM
N/A (cloud-hosted)
License
proprietary
Pricing
$2/M input · $8/M output
Deployment
Cloud API

Our take

o3 from OpenAI offers a 200K-token context window and is well-suited to strong tool calling, multi-step reasoning, coding, long-context work. Pricing is $2/M input · $8/M output, billed per token through the provider API.

Watch for the trade-offs: weights are closed, so you cannot self-host.

Compare to

Claude Haiku 4.5
Anthropic
200K context · $1/M input · $5/M output
Command A
Cohere
256K context · $2.5/M input · $10/M output
Command R+ (08-2024)
Cohere
128K context · $2.5/M input · $10/M output
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