Gemini 2.5 Pro vs Phi-4
A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.
Updated
Gemini 2.5 Pro specs · Phi-4 specs- PriceGemini 2.5 Pro
Gemini 2.5 Pro publishes pricing ($10.00 / 1M output tokens) while Phi-4 does not.
- Context windowGemini 2.5 Pro
Gemini 2.5 Pro accepts 2.1M tokens vs 16K, 131.1× the room for long documents and codebases.
- BenchmarksGemini 2.5 Pro
Gemini 2.5 Pro leads in 1 of 1 shared benchmarks; the biggest gap is on MMLU (broad academic knowledge), where it scores 86.0 vs 84.8.
- ModalitiesGemini 2.5 Pro
Gemini 2.5 Pro supports 4 modalities (text, vision, audio, video) vs 1 for Phi-4.
- OpennessPhi-4
Phi-4 ships open weights (MIT); Gemini 2.5 Pro is API-only.
On balance Gemini 2.5 Pro edges ahead, winning 4 of 5 categories against Phi-4's 1. Gemini 2.5 Pro publishes pricing ($10.00 / 1M output tokens) while Phi-4 does not. Gemini 2.5 Pro accepts 2.1M tokens vs 16K, 131.1× the room for long documents and codebases.
Gemini 2.5 Pro leads in 1 of 1 shared benchmarks; the biggest gap is on MMLU (broad academic knowledge), where it scores 86.0 vs 84.8. They differ in modality coverage, Gemini 2.5 Pro handles text, vision, audio, video while Phi-4 handles text, which can be the deciding factor before you even look at benchmarks. Phi-4 ships open weights (MIT); Gemini 2.5 Pro is API-only.
Gemini 2.5 Pro is the newer of the two, released 3 months after Phi-4, which usually means a more recent knowledge cutoff and updated safety post-training. Gemini 2.5 Pro is usually picked for long context and rag workloads, while Phi-4 sees more deployments in on device and edge deployment. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.
Side-by-side specs
| Spec | Gemini 2.5 Pro | Phi-4 |
|---|---|---|
| Provider | Microsoft | |
| Released | Mar 2025 | Dec 2024 |
| Modalities | text, vision, audio, video | text |
| Context window | 2.1M tokens | 16K tokens |
| Max output | , | , |
| Input · 1M | $1.25 / 1M tokens | Pricing not published |
| Output · 1M | $10.00 / 1M tokens | Pricing not published |
| Knowledge cutoff | 2025-01 | , |
| Open weights | No | Yes (MIT) |
| API available | Yes | Yes |
Pricing at scale
What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.
- Light usage, 100k in / 50k out per day$18.75 vs ,
- Heavy usage, 1M in / 500k out per day$188 vs ,
- RAG workload, 5M in / 200k out per day$248 vs ,
Light usage, 100k in / 50k out per day: pricing not directly comparable (one or both models are missing public per-token rates). Heavy usage, 1M in / 500k out per day: pricing not directly comparable (one or both models are missing public per-token rates). RAG workload, 5M in / 200k out per day: pricing not directly comparable (one or both models are missing public per-token rates).
Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.
- Gemini 2.5 Pro$0.625
- Phi-4Pricing unavailable
Benchmarks compared
Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.
- MMLU86.084.8
- HumanEval,82.6
- GPQA84.0
Gemini 2.5 Pro fits when…
- 2M-token context window
- Strong on long-document tasks
- Native multimodal handling
- Long-context tasks, handles 2.1M tokens vs 16K for Phi-4.
- Multimodal needs covering vision, audio, video.
Phi-4 fits when…
- Exceptional quality at 14B parameters
- MIT license, clean commercial use
- Strong on math
- Self-hosting and on-prem requirements, open weights (MIT).
Consider Gemini 3 Pro
Google's late-2025 flagship, set new benchmarks on long-context, vision, and reasoning at competitive pricing.
Frequently asked
Is Gemini 2.5 Pro or Phi-4 cheaper?
Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.Which has the larger context window?
Gemini 2.5 Pro accepts 2.1M tokens vs 16K for Phi-4.Is Gemini 2.5 Pro or Phi-4 better for coding?
Both Gemini 2.5 Pro and Phi-4 are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.Are either of these models open source?
Phi-4 ships open weights (MIT). Gemini 2.5 Pro is API-only.When were Gemini 2.5 Pro and Phi-4 released?
Gemini 2.5 Pro was released by Google on 2025-03-25. Phi-4 was released by Microsoft on 2024-12-12.
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