Together AI - Llama 3 8B Lite vs Phi-4 Reasoning Vision 15B
Together AI - Llama 3 8B Lite (2025) and Phi-4 Reasoning Vision 15B (2026) are compact production models from AI at Meta and Microsoft Research. Together AI - Llama 3 8B Lite ships a 8K-token context window, while Phi-4 Reasoning Vision 15B ships a not-yet-sourced context window. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing.
Phi-4 Reasoning Vision 15B is safer overall; choose Together AI - Llama 3 8B Lite when provider fit matters.
Specs
| Released | 2025-07-15 | 2026-03-12 |
| Context window | 8K | — |
| Parameters | 8B | 15B |
| Architecture | decoder only | - |
| License | Open Source | Microsoft Research |
| Knowledge cutoff | 2024-03 | - |
Pricing and availability
| Together AI - Llama 3 8B Lite | Phi-4 Reasoning Vision 15B | |
|---|---|---|
| Input price | $0.1/1M tokens | - |
| Output price | $0.1/1M tokens | - |
| Providers | - |
Capabilities
| Together AI - Llama 3 8B Lite | Phi-4 Reasoning Vision 15B | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on multimodal input: Phi-4 Reasoning Vision 15B, function calling: Together AI - Llama 3 8B Lite, tool use: Together AI - Llama 3 8B Lite, and structured outputs: Together AI - Llama 3 8B Lite. Both models share the core language-model surface, 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: Together AI - Llama 3 8B Lite has $0.1/1M 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 Together AI - Llama 3 8B Lite when provider fit and broader provider choice are central to the workload. Choose Phi-4 Reasoning Vision 15B when provider fit are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Is Together AI - Llama 3 8B Lite or Phi-4 Reasoning Vision 15B open source?
Together AI - Llama 3 8B Lite is listed under Open Source. Phi-4 Reasoning Vision 15B is listed under Microsoft Research. 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 multimodal input, Together AI - Llama 3 8B Lite or Phi-4 Reasoning Vision 15B?
Phi-4 Reasoning Vision 15B has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for function calling, Together AI - Llama 3 8B Lite or Phi-4 Reasoning Vision 15B?
Together AI - Llama 3 8B Lite has the clearer documented function calling signal in this comparison. If function calling is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for tool use, Together AI - Llama 3 8B Lite or Phi-4 Reasoning Vision 15B?
Together AI - Llama 3 8B Lite has the clearer documented tool use signal in this comparison. If tool use is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for structured outputs, Together AI - Llama 3 8B Lite or Phi-4 Reasoning Vision 15B?
Together AI - Llama 3 8B Lite 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 Together AI - Llama 3 8B Lite and Phi-4 Reasoning Vision 15B?
Together AI - Llama 3 8B Lite is available on Together AI. 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.
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Last reviewed: 2026-04-24. Data sourced from public model cards and provider documentation.