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R1 0528

open source

DeepSeek model, released 28 May 2025.

$0.5
per 1M input tokens
$2.15
per 1M output tokens
$0.35
per 1M cached-read tokens
Calculate what your real prompts cost on R1 0528

Price history

Price stable since we started tracking (7 Jul 2026). History will chart here as soon as it moves.

Specifications

Lab
DeepSeek
Released
28 May 2025
Context window
164k tokens
Max output
33k tokens
Input modalities
text
Output modalities
text
Knowledge cutoff
2025-03-31
Open source
Yes

Benchmarks

BenchmarkCategoryScoreAs of
LMArena (Chatbot Arena)coding1426.8 (1415.4–1438.2)13 Sept 2026
LMArena (Chatbot Arena)overall1427.5 (1421.9–1433.2)13 Sept 2026

LMArena (Chatbot Arena) data © their authors, CC-BY-4.0

Frequently asked questions

How much does R1 0528 cost?

R1 0528 costs $0.5 per 1M input tokens and $2.15 per 1M output tokens (list price, updated every 6 hours).

What is R1 0528's context window?

R1 0528 supports a 164k-token context window with up to 33k output tokens.

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