Gemini 3.1 Flash TTS Preview vs Phi-4 Mini Flash Reasoning
Gemini 3.1 Flash TTS Preview (2026) and Phi-4 Mini Flash Reasoning (2025) are frontier reasoning models from Google DeepMind and Microsoft Research. Gemini 3.1 Flash TTS Preview ships a 16k-token context window, while Phi-4 Mini Flash Reasoning ships a 128k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Phi-4 Mini Flash Reasoning fits 8x more tokens; pick it for long-context work and Gemini 3.1 Flash TTS Preview for tighter calls.
Decision scorecard
Local evidence first| Signal | Gemini 3.1 Flash TTS Preview | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Best for | general production evaluation | reasoning-heavy apps |
| Decision fit | General | Long context |
| Context window | 16k | 128k |
| Cheapest output | - | - |
| Provider routes | 1 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Use Gemini 3.1 Flash TTS Preview when your own prompt tests beat the comparison signals; the local data does not show a decisive standalone advantage yet.
- Phi-4 Mini Flash Reasoning has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Phi-4 Mini Flash Reasoning uniquely exposes Reasoning in local model data.
- Local decision data tags Phi-4 Mini Flash Reasoning for Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemini 3.1 Flash TTS Preview
Unavailable
Cheapest tracked route/tier: Google AI Studio
Phi-4 Mini Flash Reasoning
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 3.1 Flash TTS Preview and Phi-4 Mini Flash Reasoning; plan for SDK, billing, or endpoint changes.
- Phi-4 Mini Flash Reasoning adds Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Phi-4 Mini Flash Reasoning and Gemini 3.1 Flash TTS Preview; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Reasoning before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-15 | 2025-12-01 |
| Context window | 16k | 128k |
| Parameters | — | 3.8B |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | MITOSI-approved |
| Openness | Proprietary | Open source |
| Weights | Not released | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: permitted |
| Knowledge cutoff | - | 2025-02 |
Pricing and availability
| Pricing attribute | Gemini 3.1 Flash TTS Preview | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Input price | $1/1M tokens | - |
| Output price | - | - |
| Providers |
Capabilities
| Capability | Gemini 3.1 Flash TTS Preview | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | Yes |
| JSON / Tool use | No | No |
| Structured outputs | No | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Continue comparing
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Popular comparisons for Gemini 3.1 Flash TTS Preview
Popular comparisons for Phi-4 Mini Flash Reasoning
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Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.