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 in an inference pass.…
Model details →DeepSeek: R1 0528 vs OpenAI: gpt-oss-20b (free)
OpenAI: gpt-oss-20b (free) wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for lower-latency inference and deplo…
Model details →Side-by-side comparison
| Capability | DeepSeek: R1 0528 | OpenAI: gpt-oss-20b (free) | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 164K | 131K | 🏆 DeepSeek: R1 0528 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.45 | $0.00 | 🏆 OpenAI: gpt-oss-20b (free) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $2.15 | $0.00 | 🏆 OpenAI: gpt-oss-20b (free) |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | — | — | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is DeepSeek: R1 0528 better than OpenAI: gpt-oss-20b (free)?
OpenAI: gpt-oss-20b (free) wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between DeepSeek: R1 0528 and OpenAI: gpt-oss-20b (free)?
Input: $0.45 vs $0.00 per 1M tokens. Output: $2.15 vs $0.00 per 1M tokens.
What context windows do DeepSeek: R1 0528 and OpenAI: gpt-oss-20b (free) support?
DeepSeek: R1 0528 supports up to 164K tokens. OpenAI: gpt-oss-20b (free) supports up to 131K tokens.
Do both DeepSeek: R1 0528 and OpenAI: gpt-oss-20b (free) support tool calling?
DeepSeek: R1 0528: yes. OpenAI: gpt-oss-20b (free): yes.