DeepSeek Reasoner

Tool callingReasoning

Website

DeepSeek reasoning model for multi-step analysis, math, coding, and tools

Context: 1M
Released: 10mo ago
Parameters: —

Sources:models.dev

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.

Other published benchmarks

Evaluation	Reported score and source
GPQA diamond	83.4% Epoch AI · deepseek-reasoner Epoch AI evaluation
OTIS Mock AIME 2024-2025	87.8% Epoch AI · deepseek-reasoner Epoch AI evaluation

Benchmark compilation: Epoch AI, Capabilities & benchmarking (CC BY attribution). Scores are converted to percentages and model names matched to the Vertical Tabs catalog. Individual evaluations are credited to their original sources. External results may carry separate licences and evaluation configurations; do not interpret scores from different harnesses as directly comparable.

Specifications

Developer: DeepSeek
Model family: DeepSeek
Type: Language model
Predecessor: —
Successor: —
Released: December 1, 2025
Model ID: deepseek/deepseek-reasoner
Openness: Open weights
License: —
Parameters: —
Input modalities: text
Output modalities: text
Modality: text->text
Max output tokens: 384K
Knowledge cutoff: 2025-09
Hugging Face: —
Source freshness: Metadata synced Oct 8, 2026, 10:17 PM UTC

Additional source evidence

Source model: deepseek/deepseek-reasoner
Source family: deepseek-thinking
Last updated: 2026-02-28
Knowledge cutoff: 2025-09
Model context: 1M
Model output limit: 384K
Open weights: Yes
File attachments: Yes
Reasoning: Yes
Tool calling: Yes
Temperature control: Yes

Downloadable weights

Hugging Face

Published benchmarks

Benchmark	Score	Evaluation details	Evidence
Aider Polyglot	74.2 · percent correct	2025-10-03	Source

Complete source record (JSON)

{
  "id": "deepseek/deepseek-reasoner",
  "name": "DeepSeek Reasoner",
  "description": "DeepSeek reasoning model for multi-step analysis, math, coding, and tools",
  "family": "deepseek-thinking",
  "last_updated": "2026-02-28",
  "knowledge": "2025-09",
  "attachment": true,
  "reasoning": true,
  "tool_call": true,
  "temperature": true,
  "modalities": {
    "input": [
      "text"
    ],
    "output": [
      "text"
    ]
  },
  "limit": {
    "context": 1000000,
    "output": 384000
  },
  "benchmarks": [
    {
      "name": "Aider Polyglot",
      "score": 74.2,
      "source": "https://aider.chat/docs/leaderboards/",
      "metric": "percent correct",
      "date": "2025-10-03"
    }
  ],
  "release_date": "2025-12-01",
  "open_weights": true,
  "weights": [
    {
      "label": "Hugging Face",
      "url": "https://huggingface.co/deepseek-ai/DeepSeek-V3.2"
    }
  ]
}

Infrastructure

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