o1

Tool callingStructured outputReasoningImage inputFile input

Launch post Website Docs

O-series reasoning model for hard analysis, math, coding, and planning

Context: 200K
Released: 1y ago
Input / 1M tokens: $15.00
Output / 1M tokens: $60.00
Cached input / 1M tokens: $7.50

Sources:models.devOpenRouter

Benchmarks

DeepSWE is the primary coding benchmark where an exact model evaluation exists. Other sourced evaluations appear below; missing scores are not zero.

Not evaluated in DeepSWE 1.1 as of 2026-09-22. Results are only shown for exact model versions in the official dataset. Official leaderboard.

No benchmark results have been matched to this model yet.

Specifications

Developer: OpenAI
Model family: o-series
Type: Language model
Predecessor: —
Successor: —
Released: December 5, 2024
Model ID: openai/o1
Openness: Closed
License: —
Input modalities: text, image, file
Output modalities: text
Modality: text+image+file->text
Tokenizer: GPT
Max output tokens: 100K
Knowledge cutoff: 2023-09
Hugging Face: —
Source freshness: Metadata synced Oct 8, 2026, 10:17 PM UTC

Additional source evidence

Source model: openai/o1
Source family: o
Last updated: 2024-12-05
Knowledge cutoff: 2023-09
Model context: 200K
Model output limit: 100K
Open weights: No
File attachments: Yes
Reasoning: Yes
Tool calling: Yes
Structured output: Yes
Temperature control: No

Published benchmarks

Benchmark	Score	Evaluation details	Evidence
Aider Polyglot	61.7 · percent correct	2024-12-21	Source

Complete source record (JSON)

{
  "id": "openai/o1",
  "name": "o1",
  "description": "O-series reasoning model for hard analysis, math, coding, and planning",
  "family": "o",
  "last_updated": "2024-12-05",
  "knowledge": "2023-09",
  "attachment": true,
  "reasoning": true,
  "tool_call": true,
  "structured_output": true,
  "temperature": false,
  "modalities": {
    "input": [
      "text",
      "image",
      "pdf"
    ],
    "output": [
      "text"
    ]
  },
  "limit": {
    "context": 200000,
    "output": 100000
  },
  "benchmarks": [
    {
      "name": "Aider Polyglot",
      "score": 61.7,
      "source": "https://aider.chat/docs/leaderboards/",
      "metric": "percent correct",
      "date": "2024-12-21"
    }
  ],
  "release_date": "2024-12-05",
  "open_weights": false
}

Infrastructure

Provider availability

All providers

Provider	Endpoint	Context	Input /M tokens	Output /M tokens	Cached input /M tokens	Cache write /M tokens	Uptime 1d	Data handling
OpenAI	openai	200K	$15.00	$60.00	$7.50	—	100.00%	ZDR: No Training: Unknown Prompt logging: Unknown Retention: Unknown ZDR source Privacy policy Checked 2026-10-15

Provider data:OpenRouter

Text provenance

EU · product-scoped

OpenAI textGrain watermarking

In the EU, ChatGPT-generated text uses textGrain. OpenAI says API customers can opt in globally for select models, so watermarking depends on the product surface and configuration.

Official explanation