DeepSeek: R1 0528

Not supportedQuick start

R1 0528 is DeepSeek's May 2025 update to its open-weight reasoning model, matching OpenAI o1 while exposing full reasoning traces. A 671B-parameter mixture-of-experts with 37B active parameters, it is a fully open-source alternative to closed frontier reasoners.

MirAPI doesn’t offer this model. The prices shown are the official list prices.

Modalities
inTextoutText
Price / 1M
$0.50 / $2.15
Context
164K
Released
May 28, 2025
Knowledge cutoff
Mar 31, 2025

Capabilities

ReasoningTool usePrompt cachingStructured output

Parameters

Request parameters this model accepts through the API.

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

Benchmarks

bar = score (0–100) · ▏ median

Scores come from vendor reports and public leaderboards, not private evals.

Intelligence Index
General ability
13.1
#106
GPQA Diamond
Science QA
77.2
#85
τ-bench (airline)
Agentic tool use
50.0
#99

Showcase

Every chat model gets the same three fixed prompts. Outputs are archived verbatim, so you can copy a prompt and reproduce the result.

Task prompt · identical for all models
Build a single-file HTML page using three.js from a CDN: a low-poly planet with a tilted ring of ~200 orbiting particles, a soft key light plus rim light, slow auto-rotation, and drag-to-orbit controls. No build tools — one file only.
Archived output
Archive not published yet

Every model will run this exact prompt, and its output will appear here verbatim with token counts and the cost per run.

Quick start

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.mirapi.ai/v1",   # changed
    api_key=os.environ["MIRAPI_API_KEY"],   # changed
)

resp = client.chat.completions.create(
    model="",
    messages=[{"role": "user", "content": "Hello"}],
)
Wire R1 0528 into your product

1M free tokens to start, no card required. It’s OpenAI-compatible, so you only change the base URL.

Start free