Comprehensive side-by-side LLM comparison
o4-mini leads with 51.3% higher average benchmark score. o4-mini offers 283.6K more tokens in context window than DeepSeek-V2.5. DeepSeek-V2.5 is $5.08 cheaper per million tokens. o4-mini supports multimodal inputs. DeepSeek-V2.5 is available on 3 providers. Overall, o4-mini is the stronger choice for coding tasks.
DeepSeek
DeepSeek-V2.5 was developed as an enhanced iteration of the DeepSeek-V2 architecture, designed to incorporate improvements in model quality and efficiency. Built to advance the DeepSeek foundation model series, it provides refined capabilities for general-purpose language understanding and generation tasks.
OpenAI
o4-mini was created as part of the next generation of OpenAI's reasoning models, designed to continue advancing the balance between analytical capability and operational efficiency. Built to bring cutting-edge reasoning techniques to applications requiring quick turnaround, it represents the evolution of compact reasoning-focused models.
11 months newer

DeepSeek-V2.5
DeepSeek
2024-05-08

o4-mini
OpenAI
2025-04-16
Cost per million tokens (USD)

DeepSeek-V2.5

o4-mini
Context window and performance specifications
Average performance across 1 common benchmarks

DeepSeek-V2.5

o4-mini
Performance comparison across key benchmark categories

DeepSeek-V2.5

o4-mini
o4-mini
2024-05-31
Available providers and their performance metrics

DeepSeek-V2.5
DeepInfra
DeepSeek
Hyperbolic

DeepSeek-V2.5

o4-mini

DeepSeek-V2.5

o4-mini

o4-mini
OpenAI