NOUMENOpen app
NOUMEN

DeepSeek · Open weights

DeepSeek R1 0528

Added May 28, 2025Open weights

Compare models

Choose up to 3 models to compare.1 of 3 chosen

Loading models…

Use in the app

The new (May 28th) Deepseek R1 model.

  • Reasoning
  • Tools
Input
Text
Output
Text
Discovery tier
Open weights

Pricing

USD per 1M tokens
Input
$0.50
Output
$2.15
Cache read
$0.35

Reference prices as published by the model provider. API example

Specifications

Context window
163.8K
Max output
32.8K
Average output (7 days)
1K tokens
Longer than 71% of 465 models

Side by side

DeepSeek R1 0528 compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

Compare models

Choose up to 3 models to compare.1 of 3 chosen

Loading models…

DeepSeek R1 0528DeepSeekThis modelGPT 5 NanoOpenAIRemove
ProviderDeepSeekOpenAI
Discovery tierOpen weightsEfficient
AddedMay 28, 2025Aug 7, 2025
Limits
Context window163.84K400KBest
Max output32.77K128KBest
Average output1K tokens322 tokens
Pricing, USD per 1M tokens
Input$0.50$0.05Best
Output$2.15$0.40Best
Cache read$0.35$0.005Best
Performance
Throughput33.0 tok/s101.5 tok/sBest
Time to first token1.3 sBest2.0 s
Request success (24h)99.9%100.0%Best
Benchmark indexes
Intelligence Index13.1Best13.0
Math Index76.083.7Best
Capabilities
ReasoningYesYes
ToolsYesNo
VisionNoYes
Reasoning effort—minimal, low, medium, high

Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

  • DeepSeek R1 0528
  • GPT 5 Nano

Intelligence Index

  • DeepSeek R1 052813.1
  • GPT 5 Nano13.0

DeepSeek R1 0528: Better than 32% of 326 scored models

3.8Catalog models by score55.1

Indexes

  • Math Index

    Composite of the math evaluations

    • DeepSeek R1 0528: 76.0
    • GPT 5 Nano: 83.7Top

Document reasoning

  • AA-LCRv1.1

    Reasoning across long documents

    • DeepSeek R1 0528: 55.7%Top
    • GPT 5 Nano: 45.0%

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • DeepSeek R1 0528: 15.8%Top
    • GPT 5 Nano: 9.5%

  • GPQA Diamond

    Graduate-level science questions

    • DeepSeek R1 0528: 81.3%Top
    • GPT 5 Nano: 67.6%

  • MMLU-Pro

    Multi-subject knowledge and reasoning

    • DeepSeek R1 0528: 84.9%Top
    • GPT 5 Nano: 78.0%

  • IFBench

    Following precise output instructions

    • DeepSeek R1 0528: 39.6%
    • GPT 5 Nano: 67.6%Top

Coding

  • LiveCodeBench

    Recent competitive programming problems

    • DeepSeek R1 0528: 77.0%
    • GPT 5 Nano: 78.9%Top

Math

  • AIME 2025

    Competition mathematics, 2025 problems

    • DeepSeek R1 0528: 76.0%
    • GPT 5 Nano: 83.7%Top

  • AIME

    Competition mathematics

    • DeepSeek R1 0528: 89.3%
    • GPT 5 Nano: —

  • MATH-500

    Competition math problems

    • DeepSeek R1 0528: 98.3%
    • GPT 5 Nano: —

Legacy evaluations

  • Terminal-Bench Hard

    Earlier terminal task suite

    • DeepSeek R1 0528: 15.9%Top
    • GPT 5 Nano: 12.1%

  • τ²-Bench Telecom

    Tool use in a customer-support simulation

    • DeepSeek R1 0528: 36.5%Top
    • GPT 5 Nano: 36.5%Top

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • DeepSeek R1 0528: 55.7%Top
    • GPT 5 Nano: 45.0%

Scores from Artificial Analysis, updated Oct 26, 2026. Artificial Analysis

Live routing data

Performance and reliability

Recent averages across requests routed for this model. Your own speed depends on prompt length, reasoning effort and load.

Throughput
33.0 tok/s
Faster than 23% of 250 models
Time to first token
1.3 s
Quicker than 90% of 250 models
Prompt cache hits
59.2%
About $0.41 per 1M input tokens with caching
Request success (24h)
99.9%
Reliable

Cache hits are the share of input tokens recently served from a prompt cache across all requests. They are not a forecast of your own hit rate.

Hourly request success · last 72 hoursLowest hour 62.2%
  • Healthy (98% or more)
  • Degraded (90–98%)
  • Down (under 90%)
  • No requests

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart
curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-ai/DeepSeek-R1-0528",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'
import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="deepseek-ai/DeepSeek-R1-0528",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

DeepSeek

Other DeepSeek models, starting with the same family.