AI model comparison
R1 0528 vs o3 Mini
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
DeepSeek
R1 0528
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.
- Input / 1M
- $0.50
- Output / 1M
- $2.15
- Context
- 164K
OpenAI
o3 Mini
OpenAI o3-mini is a cost-efficient language model optimized for STEM reasoning tasks, particularly excelling in science, mathematics, and coding.
- Input / 1M
- $1.10
- Output / 1M
- $4.40
- Context
- 200K
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
R1 0528
2.1x cheaper for a typical chat
Higher intelligence score
R1 0528
13.1 vs 12.5 on Artificial Analysis
Larger context window
o3 Mini
200K vs 164K tokens
Newer release
R1 0528
Released May 28, 2025
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
R1 052813.1o3 Mini12.5Coding index
R1 0528Not availableo3 MiniNot availableAgentic index
R1 0528Not availableo3 MiniNot availablePricing
R1 0528 vs o3 Mini API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | R1 0528 | o3 Mini |
|---|---|---|
| Input tokensPer 1M tokens | $0.50 | $1.10 |
| Output tokensPer 1M tokens | $2.15 | $4.40 |
| Cached input (read)Per 1M tokens | $0.35 | $0.55 |
| Cache writePer 1M tokens | Not available | Not available |
| Web searchPer request | Not available | $0.01 |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
R1 0528$2.08o3 Mini$4.40Coding task
30K in, 4K out
R1 0528$23.60$19.10 cachedo3 Mini$50.60$34.10 cachedLong document summary
150K in, 2K out
R1 0528$79.30$56.80 cachedo3 Mini$173.80$91.30 cachedSpecs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | R1 0528 | o3 Mini |
|---|---|---|
| Context window | 164K tokens | 200K tokens |
| Max output | 33K tokens | 100K tokens |
| Input types | Text | File, Text |
| Output types | Text | Text |
| Reasoning effort levels | Not available | Not available |
| Default reasoning effort | Not available | Not available |
| Release date | May 28, 2025 | January 31, 2025 |
Features
Supported features
API features available for each model.
| Metric | R1 0528 | o3 Mini |
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Supported | Not supported |
| Stop sequences | Supported | Not supported |
| Deterministic seed | Supported | Supported |
| Verbosity control | Not supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
R1 0528View full model details- R1 0528 vs Gemini 3.1 Flash Lite
- R1 0528 vs Gemini 2.5 Flash
- R1 0528 vs Kimi K2 0905
- R1 0528 vs DeepSeek V3.1 Terminus
- R1 0528 vs DeepSeek V3.1
- R1 0528 vs Nova 2 Lite
- R1 0528 vs Command A
- R1 0528 vs GLM 4.5
- R1 0528 vs Kimi K2 0711
- R1 0528 vs Qwen3 235B A22B Thinking 2507
- R1 0528 vs MiniMax M1
- R1 0528 vs R1
- R1 0528 vs DeepSeek V3 0324
o3 MiniView full model details- o3 Mini vs Claude Haiku 4.5
- o3 Mini vs o4 Mini
- o3 Mini vs Gemini 2.5 Flash
- o3 Mini vs Mistral Medium 3.5
- o3 Mini vs Command A
- o3 Mini vs GLM 4.5
- o3 Mini vs GPT-4.1
- o3 Mini vs Kimi K2 0711
- o3 Mini vs Qwen3 235B A22B Thinking 2507
- o3 Mini vs o1-pro
- o3 Mini vs Sonar Reasoning Pro
- o3 Mini vs o3 Mini High
- o3 Mini vs GPT-4.1 Mini
- o3 Mini vs GPT-4o (2024-11-20)
Our take
R1 0528 is 2.1x cheaper for a typical chat. R1 0528 scores higher on the Artificial Analysis Intelligence Index (13.1 vs 12.5). o3 Mini has the larger context window (200K vs 164K tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is R1 0528 or o3 Mini cheaper?
R1 0528 is cheaper for a typical chat (2K input tokens and 500 output tokens). R1 0528 costs $0.50 per 1M input tokens and $2.15 per 1M output tokens, while o3 Mini costs $1.10 per 1M input tokens and $4.40 per 1M output tokens.
Which has a bigger context window, R1 0528 or o3 Mini?
o3 Mini supports up to 200K tokens of context, compared with 164K for R1 0528.
Is R1 0528 smarter than o3 Mini?
On the Artificial Analysis Intelligence Index, R1 0528 scores 13.1 and o3 Mini scores 12.5, putting R1 0528 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use R1 0528 and o3 Mini at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see R1 0528 and o3 Mini answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to R1 0528 and o3 Mini at the same time. Compare the answers side by side and keep the best one.