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Comparison · 2 models · Updated Nov 2, 2026

DeepSeek R1 0528 vs GPT OSS 20B

GPT OSS 20B comes out ahead, 61 to 53 on our weighted score, and it is the cheaper option too.

  1. DeepSeek

    DeepSeek R1 0528

    Released May 28, 2025

    53/100
    • ECI141.2
    • Price$0.512 / $2.19
    • Context164K
    Full specs Remove DeepSeek R1 0528
  2. Our pick

    OpenAI

    GPT OSS 20B

    Released Aug 5, 2025

    61/100
    • ECI137.8
    • Price$0.07 / $0.25
    • Context131K
    Full specs Remove GPT OSS 20B

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

GPT OSS 20B is our pick

GPT OSS 20B is the better all-round choice, scoring 61/100 against DeepSeek R1 0528 (53). It leads on price. DeepSeek R1 0528 wins on capability and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityDeepSeek R1 0528Capabilities Index (ECI): DeepSeek R1 0528 141.2 · GPT OSS 20B 137.8
  • Lowest priceGPT OSS 20BGPT OSS 20B $0.115 · DeepSeek R1 0528 $0.932 per 1M tokens (3:1 blend)
  • Longest contextDeepSeek R1 0528DeepSeek R1 0528 163,840 · GPT OSS 20B 131,072 tokens
  • Widest inputsSame inputsDeepSeek R1 0528: Text · GPT OSS 20B: Text
  • Self-hostingAll open weightsEvery model here can be downloaded and run on your own hardware
How the score is built
MeasureWeightDeepSeek R1 0528GPT OSS 20B
CapabilityCapabilities Index (ECI)50%6661
Price25%4990
Inputs & features15%3535
Context window10%2825
Overall100%53/10061/100
02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

DeepSeek R1 0528 vs GPT OSS 20B specifications side by side
SpecificationDeepSeek R1 0528DeepSeekGPT OSS 20BOpenAI
Capability
Capabilities Index (ECI)141.2 (best)137.8
ECI rank#108 of 165 (best)#122 of 165
GPQA DiamondGraduate-level science questions76.3% (best)60.8%
OTIS Mock AIME 2024–2025Competition mathematics66.4% (best)65.3%
Price per million tokens
Input$0.512$0.07 (best)
Output$2.19$0.25 (best)
Cached input——
Blended (3:1)$0.932$0.115 (best)
Long-context rateSame rateSame rate
Price sourceMedian of 16 providersMedian of 37 providers
Limits
Context window163,840 tokens (best)131,072 tokens
Max output32,768 tokens32,768 tokens
Inputs and features
TextYesYes
ImagesNoNo
PDFsNoNo
AudioNoNo
VideoNoNo
ReasoningYesYes
Tool callingYesYes
Structured outputNoNo
Availability
WeightsOpenMITOpen
API model ID——
API providers1641 (best)
ReleasedMay 28, 2025Aug 5, 2025
Knowledge cutoff—Jun 2024
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • DeepSeek R1 0528$9.50
  • GPT OSS 20B$1.20
04 — Questions

Which should you choose?

Which is better: DeepSeek R1 0528 or GPT OSS 20B?

GPT OSS 20B is the better all-round choice, scoring 61/100 against DeepSeek R1 0528 (53). It leads on price. DeepSeek R1 0528 wins on capability and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, DeepSeek R1 0528 or GPT OSS 20B?

GPT OSS 20B is cheaper at $0.07 input / $0.25 output per million tokens (median across 37 API providers). DeepSeek R1 0528 costs $0.512 input / $2.19 output per million tokens (median across 16 API providers). At a typical mix of three input tokens to one output token, that is $0.115 per million tokens for GPT OSS 20B versus $0.932 for DeepSeek R1 0528 (8.1× as much).

Which scores higher on benchmarks?

DeepSeek R1 0528 scores higher on the Capabilities Index (ECI): DeepSeek R1 0528 141.2 (#108 of 165) and GPT OSS 20B 137.8 (#122 of 165). The confidence ranges of the top two overlap (139.0–142.9 vs 133.1–139.7), so treat the gap as small. On individual benchmarks: GPQA Diamond — DeepSeek R1 0528 76.3%, GPT OSS 20B 60.8%; OTIS Mock AIME 2024–2025 — DeepSeek R1 0528 66.4%, GPT OSS 20B 65.3%.

Which is better for coding?

There are no published SWE-bench Verified results for DeepSeek R1 0528 and GPT OSS 20B yet, so there is no like-for-like coding score. On overall capability, DeepSeek R1 0528 leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.

Which has the bigger context window?

DeepSeek R1 0528 has the largest context window at 163,840 tokens, against 131,072 for GPT OSS 20B. Maximum output per response: DeepSeek R1 0528 up to 32,768, GPT OSS 20B up to 32,768 tokens.

Which can read images, PDFs, audio or video?

DeepSeek R1 0528 accepts text; GPT OSS 20B accepts text. They handle the same number of input types.

Are any of these open source?

Yes, both publish their weights (MIT), so you can self-host them.

Which is newer?

GPT OSS 20B is the newest, released Aug 5, 2025. DeepSeek R1 0528 came out May 28, 2025. Knowledge cutoff: GPT OSS 20B Jun 2024.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.

05 — Keep comparing

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