R1 0528
DeepSeekReleased May 28, 2025
May 28th update to the [original DeepSeek R1](/deepseek/deepseek-r1) Performance on par with [OpenAI o1](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active...
- Context window
- 164K tokens
- Max output
- 33K tokens
- Input
- text
- Output
- text
- Tokenizer
- DeepSeek
- Knowledge cutoff
- Mar 31, 2025
- Released
- May 28, 2025
- Reasoning
- always on
Pricing
Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.
| Per 1M tokens | Provider | + 3% fee | You pay |
|---|---|---|---|
| Input | $0.500 | $0.015 | $0.515 |
| Output | $2.15 | $0.065 | $2.21 |
| Cache read | $0.350 | $0.010 | $0.360 |
Benchmarks
Design Arena
| Category | Elo | Win rate | Rank |
|---|---|---|---|
| 3Dmodels | 1188 | 53.4% | #49 |
| Codemodels | 1188 | 52.6% | #57 |
| Data vizmodels | 1222 | 60.7% | #36 |
| Game devmodels | 1164 | 49.5% | #59 |
| SVGmodels | 1096 | 48.7% | #51 |
| UI componentsmodels | 1160 | 55.1% | #58 |
| Websitesmodels | 1192 | 52.7% | #56 |
Head-to-head preference voting. How we filter and rank
Supported parameters
- frequency_penalty
- include_reasoning
- logit_bias
- logprobs
- max_tokens
- min_p
- presence_penalty
- reasoning
- repetition_penalty
- response_format
- seed
- stop
- structured_outputs
- temperature
- tool_choice
- tools
- top_k
- top_logprobs
- top_p
Call it
OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model deepseek/deepseek-r1-0528.
curl https://api.openkey.ai/v1/chat/completions \
-H "Authorization: Bearer $OPENKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "deepseek/deepseek-r1-0528",
"messages": [{"role": "user", "content": "Hello"}]
}'import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.openkey.ai/v1",
api_key=os.environ["OPENKEY_API_KEY"],
)
completion = client.chat.completions.create(
model="deepseek/deepseek-r1-0528",
messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.openkey.ai/v1",
apiKey: process.env.OPENKEY_API_KEY,
});
const completion = await client.chat.completions.create({
model: "deepseek/deepseek-r1-0528",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);Questions
- How much does R1 0528 cost via API?
- Through OpenKey, R1 0528 costs $0.515 per 1M input tokens and $2.21 per 1M output tokens. That is the provider price ($0.500 / $2.15) plus a flat 3% fee — nothing else.
- What is R1 0528's context window?
- R1 0528 accepts up to 164K tokens of context and returns up to 33K tokens per request.
- Is R1 0528 OpenAI-compatible?
- Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "deepseek/deepseek-r1-0528" using any OpenAI SDK — only the base URL and API key change.
- What inputs does R1 0528 support?
- R1 0528 accepts text input and produces text output. Its knowledge cutoff is Mar 31, 2025.
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