Community Sentiment
Mostly Positive
Based on Reddit reviewsCommunity Verdict
Best for Complex Reasoning
Input Modalities
TextOutput Modalities
TextPrice / 1M tokens
$15$60
InputOutput
Best For
Complex reasoning in science, code, math (historical)
PhD-level scientific problem solving
Competitive coding (89th percentile)
Tasks needing slow, deliberate thinking
Accuracy-over-speed applications
Self-fact-checking workflows
Avoid For
All new dev (deprecated July 28, 2025 — use o3)
Low-latency needs (slow responses)
Function calling (not supported; o3 does)
Structured output (not supported; o3 does)
Vision inputs (not supported; o3 does)
Fine-tuning (not supported)
Cost-sensitive, high-volume use
128,000 context window
32,768 max output tokens
Oct 1, 2023 knowledge cutoff
Reasoning supported
Pricing
o1 Preview API pricing is based on token usage for input and output. Prices are listed per 1M tokens, with lower rates for cached input. Tool-specific features may add per-call fees.
Text tokens
Per 1M tokens
Input$15.00
Cached input$7.50
Output$60.00
Example costs (o1 Preview)
TASK
APPROX COST
Complex reasoning task
~$0.50–$2.00
PhD-level science problem
~$1.00–$5.00
Competitive programming
~$0.75–$3.00
Modalities
What the model can accept and produce
TextInput and output
ImagesNot supported
AudioNot supported
VideoNot supported
Features
Platform-level capabilities
StreamingSupported
Function callingSupported
Structured outputsSupported
Fine-tuningNot supported
DistillationNot supported
Predicted outputsNot supported
Tools
Tools supported by this model when using the Responses API.
Web searchNot supported
File searchSupported
Image generationNot supported
Code interpreterSupported
MCPNot supported
Computer useNot supported
Snapshots
o1 Preview model snapshots ensure stable behavior by locking a specific version. See all available snapshots and aliases below.
o1-previewDeprecated
↪ o1-preview-2024-09-12o1-preview-2024-09-12Deprecated
FAQs
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