Gemini 2.5 Pro Preview 05-06 vs Phi-4 Reasoning Vision 15B
Gemini 2.5 Pro Preview 05-06 (2025) and Phi-4 Reasoning Vision 15B (2026) are general-purpose language models from Google DeepMind and Microsoft Research. Gemini 2.5 Pro Preview 05-06 ships a 1m-token context window, while Phi-4 Reasoning Vision 15B ships a not-yet-sourced context window. On Massive Multi-discipline Multimodal Understanding, Gemini 2.5 Pro Preview 05-06 leads by 25.3 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Phi-4 Reasoning Vision 15B is safer overall; choose Gemini 2.5 Pro Preview 05-06 when vision-heavy evaluation matters.
Decision scorecard
Local evidence first| Signal | Gemini 2.5 Pro Preview 05-06 | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Best for | multimodal apps and long-context analysis | multimodal apps |
| Decision fit | RAG, Long context, and Vision | Vision |
| Context window | 1m | — |
| Cheapest output | $10/1M tokens | - |
| Provider routes | 1 tracked | 0 tracked |
| Shared benchmarks | Massive Multi-discipline Multimodal Understanding leader | 1 rows |
Decision tradeoffs
- Gemini 2.5 Pro Preview 05-06 holds a shared-benchmark lead on Massive Multi-discipline Multimodal Understanding, ahead by 25.3 points.
- Gemini 2.5 Pro Preview 05-06 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 2.5 Pro Preview 05-06 has broader tracked provider coverage for fallback and procurement flexibility.
- Gemini 2.5 Pro Preview 05-06 uniquely exposes Structured outputs in local model data.
- Local decision data tags Gemini 2.5 Pro Preview 05-06 for RAG, Long context, and Vision.
- Local decision data tags Phi-4 Reasoning Vision 15B for Vision.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemini 2.5 Pro Preview 05-06
$3,500
Cheapest tracked route/tier: OpenRouter
Phi-4 Reasoning Vision 15B
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Gemini 2.5 Pro Preview 05-06 and Phi-4 Reasoning Vision 15B; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Structured outputs before moving production traffic.
- No overlapping tracked provider route is sourced for Phi-4 Reasoning Vision 15B and Gemini 2.5 Pro Preview 05-06; plan for SDK, billing, or endpoint changes.
- Gemini 2.5 Pro Preview 05-06 adds Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-05-06 | 2026-03-12 |
| Context window | 1m | — |
| Parameters | — | 15B |
| Architecture | decoder only | - |
| License | Proprietary | MIT(OSI) |
| Openness | Proprietary | Open source |
| Commercial use | Commercial use with conditions | Commercial use allowed |
| Knowledge cutoff | 2025-01 | 2025-03 |
Pricing and availability
| Pricing attribute | Gemini 2.5 Pro Preview 05-06 | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Input price | $1.25/1M tokens | - |
| Output price | $10/1M tokens | - |
| Providers | - |
Capabilities
| Capability | Gemini 2.5 Pro Preview 05-06 | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | Yes | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Gemini 2.5 Pro Preview 05-06 | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Massive Multi-discipline Multimodal Understanding | 79.6 | 54.3 |
Deep dive
On shared benchmark coverage, Massive Multi-discipline Multimodal Understanding has Gemini 2.5 Pro Preview 05-06 at 79.6 and Phi-4 Reasoning Vision 15B at 54.3, with Gemini 2.5 Pro Preview 05-06 ahead by 25.3 points. The largest visible gap is 25.3 points on Massive Multi-discipline Multimodal Understanding, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on structured outputs: Gemini 2.5 Pro Preview 05-06. Both models share vision and multimodal input, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
Pricing coverage is uneven: Gemini 2.5 Pro Preview 05-06 has $1.25/1M input tokens and Phi-4 Reasoning Vision 15B has no token price sourced yet. Provider availability is 1 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Gemini 2.5 Pro Preview 05-06 when vision-heavy evaluation and broader provider choice are central to the workload. Choose Phi-4 Reasoning Vision 15B when vision-heavy evaluation are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Is Gemini 2.5 Pro Preview 05-06 or Phi-4 Reasoning Vision 15B open source?
Gemini 2.5 Pro Preview 05-06 is listed under Proprietary. Phi-4 Reasoning Vision 15B is listed under MIT. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Gemini 2.5 Pro Preview 05-06 or Phi-4 Reasoning Vision 15B?
Both Gemini 2.5 Pro Preview 05-06 and Phi-4 Reasoning Vision 15B expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for multimodal input, Gemini 2.5 Pro Preview 05-06 or Phi-4 Reasoning Vision 15B?
Both Gemini 2.5 Pro Preview 05-06 and Phi-4 Reasoning Vision 15B expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for structured outputs, Gemini 2.5 Pro Preview 05-06 or Phi-4 Reasoning Vision 15B?
Gemini 2.5 Pro Preview 05-06 has the clearer documented structured outputs signal in this comparison. If structured outputs is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Gemini 2.5 Pro Preview 05-06 and Phi-4 Reasoning Vision 15B?
Gemini 2.5 Pro Preview 05-06 is available on OpenRouter. Phi-4 Reasoning Vision 15B is available on the tracked providers still being sourced. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
When should I pick Gemini 2.5 Pro Preview 05-06 over Phi-4 Reasoning Vision 15B?
Phi-4 Reasoning Vision 15B is safer overall; choose Gemini 2.5 Pro Preview 05-06 when vision-heavy evaluation matters. If your workload also depends on vision-heavy evaluation, start with Gemini 2.5 Pro Preview 05-06; if it depends on vision-heavy evaluation, run the same evaluation with Phi-4 Reasoning Vision 15B.
Continue comparing
Last reviewed: 2026-06-04. Data sourced from public model cards and provider documentation.