Compare the listed model data for DeepSeek-R1 by DeepSeek and DeepSeek-R1 (May 28) by DeepSeek. Benchmark and pricing records are not a controlled test and may change.
Data last updated: 2026-10-16. Verify current model details with each provider.
What the listed data says
DeepSeek-R1: 128K tokens; DeepSeek-R1 (May 28): 128K tokens. The listed context-window values are equal. DeepSeek-R1 is listed for coding, reasoning, long-context tasks; DeepSeek-R1 (May 28) is listed for coding, reasoning, long-context tasks. Shared catalog benchmark entries: GPQA Diamond: DeepSeek-R1 71.5%; DeepSeek-R1 (May 28) 75.7%; SWE-bench Verified: DeepSeek-R1 49.2%; DeepSeek-R1 (May 28) 57.6%; LiveCodeBench: DeepSeek-R1 65.9%; DeepSeek-R1 (May 28) 69.5%. These records are reference data, not a controlled head-to-head test; verify current pricing and specifications with each provider.
Catalog source links
Use these model and provider links to verify current specifications, pricing, and availability.
The first listed parameter quantities are 671B total (37B active via MoE) and 671B total (37B active via MoE); the larger quantity is 1× the smaller. Total and active MoE parameters are not directly equivalent.
The catalog release dates are January 2025 and May 28, 2025, about 4 months apart at the precision supplied.
Cost example: 1M input and 1M output tokens
Using only the catalog's listed per-million-token rates, 1M input plus 1M output tokens costs about $2.74 for DeepSeek-R1 and $2.74 for DeepSeek-R1 (May 28). This excludes provider-specific discounts, caching, and other fees.
Choose DeepSeek-R1 if…
Choose DeepSeek-R1 when your task aligns with catalog-listed uses or strengths such as Competition mathematics and proof verification, Advanced software engineering: debugging complex systems, production-grade algorithms, Scientific research in physics, chemistry, biology, Enterprise AI agents needing transparent, auditable reasoning.
Choose DeepSeek-R1 (May 28) if…
Choose DeepSeek-R1 (May 28) when your task aligns with catalog-listed uses or strengths such as Software engineering tasks requiring real-world code changes, Competition mathematics at AIME/Olympiad level, Drop-in improvement wherever R1 was previously used, Significant improvement over original R1 — SWE-bench 49.2% → 57.6%.
Feature Comparison — DeepSeek-R1 vs DeepSeek-R1 (May 28)
Catalog specifications for DeepSeek-R1 and DeepSeek-R1 (May 28)
Specification
DeepSeek-R1
DeepSeek-R1 (May 28)
Provider
DeepSeek
DeepSeek
Parameters
671B total (37B active via MoE)
671B total (37B active via MoE)
Context window
128K tokens
128K tokens
Maximum output
Not listed
Not listed
Catalog pricing
Open source MIT license — free to self-host. DeepSeek API: $0.14/MTok input (cache hit), $0.55/MTok input, $2.19/MTok output
MIT open source. DeepSeek API: ~$0.55/MTok input, $2.19/MTok output
Listed input/output cost per 1M tokens
input $0.55, output $2.19 per 1M tokens
input $0.55, output $2.19 per 1M tokens
License
MIT
MIT
Coding support
Listed
Listed
Reasoning support
Listed
Listed
Vision input
Not listed
Not listed
Multimodal
Not listed
Not listed
Open weights
Yes
Yes
Benchmark: GPQA Diamond
71.5%
75.7%
Benchmark: SWE-bench Verified
49.2%
57.6%
Benchmark: LiveCodeBench
65.9%
69.5%
Figures are transcribed from LITHOVEX model records. Benchmark versions and evaluation setups may differ; pricing and specifications can change. Check each provider's current documentation before making a decision.
Frequently Asked Questions
What is different between DeepSeek-R1 and DeepSeek-R1 (May 28)?
DeepSeek-R1: 128K tokens; DeepSeek-R1 (May 28): 128K tokens. The listed context-window values are equal. DeepSeek-R1 is listed for coding, reasoning, long-context tasks; DeepSeek-R1 (May 28) is listed for coding, reasoning, long-context tasks. Shared catalog benchmark entries: GPQA Diamond: DeepSeek-R1 71.5%; DeepSeek-R1 (May 28) 75.7%; SWE-bench Verified: DeepSeek-R1 49.2%; DeepSeek-R1 (May 28) 57.6%; LiveCodeBench: DeepSeek-R1 65.9%; DeepSeek-R1 (May 28) 69.5%. These records are reference data, not a controlled head-to-head test; verify current pricing and specifications with each provider.
What benchmark values are listed for DeepSeek-R1 and DeepSeek-R1 (May 28)?
GPQA Diamond: DeepSeek-R1 71.5%; DeepSeek-R1 (May 28) 75.7%; SWE-bench Verified: DeepSeek-R1 49.2%; DeepSeek-R1 (May 28) 57.6%; LiveCodeBench: DeepSeek-R1 65.9%; DeepSeek-R1 (May 28) 69.5%. The catalog values may use different versions and evaluation setups, so they are reference points rather than a controlled head-to-head result.
Which model has the larger listed context window?
DeepSeek-R1: 128K tokens; DeepSeek-R1 (May 28): 128K tokens. The listed context-window values are equal.
What are the listed costs per million tokens for DeepSeek-R1 and DeepSeek-R1 (May 28)?
DeepSeek-R1: input $0.55, output $2.19 per 1M tokens (Open source MIT license — free to self-host. DeepSeek API: $0.14/MTok input (cache hit), $0.55/MTok input, $2.19/MTok output). DeepSeek-R1 (May 28): input $0.55, output $2.19 per 1M tokens (MIT open source. DeepSeek API: ~$0.55/MTok input, $2.19/MTok output). Where separate numeric input and output rates are available, the worked example uses 1M input plus 1M output tokens. Confirm current terms with each provider.
How far apart are the listed release dates for DeepSeek-R1 and DeepSeek-R1 (May 28)?
The catalog lists DeepSeek-R1 as January 2025 and DeepSeek-R1 (May 28) as May 28, 2025, about 4 months apart at the precision supplied.
When was the comparison data last updated?
The model catalog records 2026-10-16 as its data update date. Provider specifications and prices may have changed since then.
How should I choose between DeepSeek-R1 and DeepSeek-R1 (May 28)?
Compare the listed specifications and capabilities, review the benchmark notes, then test both with the same representative prompt for your task. This page does not claim a universal winner.
Create your free LITHOVEX account and compare DeepSeek-R1 and DeepSeek-R1 (May 28) on your actual tasks. No credit card, no API key, no subscriptions needed.