GPT-4 Turbo (older v1106) vs Phi-4 Reasoning Vision 15B
GPT-4 Turbo (older v1106) (2023) and Phi-4 Reasoning Vision 15B (2026) are compact production models from OpenAI and Microsoft Research. GPT-4 Turbo (older v1106) ships a 128k-token context window, while Phi-4 Reasoning Vision 15B ships a not-yet-sourced 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 Reasoning Vision 15B is safer overall; choose GPT-4 Turbo (older v1106) when provider fit matters.
Decision scorecard
Local evidence first| Signal | GPT-4 Turbo (older v1106) | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Best for | general production evaluation | multimodal apps |
| Decision fit | RAG, Long context, and Classification | Vision |
| Context window | 128k | — |
| Cheapest output | $30/1M tokens | - |
| Provider routes | 1 tracked | 0 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- GPT-4 Turbo (older v1106) has the larger context window for long prompts, retrieval packs, or transcript analysis.
- GPT-4 Turbo (older v1106) has broader tracked provider coverage for fallback and procurement flexibility.
- GPT-4 Turbo (older v1106) uniquely exposes Structured outputs in local model data.
- Local decision data tags GPT-4 Turbo (older v1106) for RAG, Long context, and Classification.
- Phi-4 Reasoning Vision 15B uniquely exposes Multimodal in local model data.
- 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.
GPT-4 Turbo (older v1106)
$15,500
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 GPT-4 Turbo (older v1106) and Phi-4 Reasoning Vision 15B; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Structured outputs before moving production traffic.
- Phi-4 Reasoning Vision 15B adds Multimodal in local capability data.
- No overlapping tracked provider route is sourced for Phi-4 Reasoning Vision 15B and GPT-4 Turbo (older v1106); plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Multimodal before moving production traffic.
- GPT-4 Turbo (older v1106) adds Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2023-11-06 | 2026-03-12 |
| Context window | 128k | — |
| Parameters | — | 15B |
| Architecture | decoder only | - |
| License | Proprietary | Microsoft Research |
| Knowledge cutoff | 2023-04 | 2025-03 |
Pricing and availability
| Pricing attribute | GPT-4 Turbo (older v1106) | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Input price | $10/1M tokens | - |
| Output price | $30/1M tokens | - |
| Providers | - |
Capabilities
| Capability | GPT-4 Turbo (older v1106) | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Vision | No | No |
| Multimodal | No | 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
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 and structured outputs: GPT-4 Turbo (older v1106). 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: GPT-4 Turbo (older v1106) has $10/1M 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 GPT-4 Turbo (older v1106) 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. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Is GPT-4 Turbo (older v1106) or Phi-4 Reasoning Vision 15B open source?
GPT-4 Turbo (older v1106) is listed under Proprietary. 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, GPT-4 Turbo (older v1106) 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 structured outputs, GPT-4 Turbo (older v1106) or Phi-4 Reasoning Vision 15B?
GPT-4 Turbo (older v1106) 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 GPT-4 Turbo (older v1106) and Phi-4 Reasoning Vision 15B?
GPT-4 Turbo (older v1106) 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 GPT-4 Turbo (older v1106) over Phi-4 Reasoning Vision 15B?
Phi-4 Reasoning Vision 15B is safer overall; choose GPT-4 Turbo (older v1106) when provider fit matters. If your workload also depends on provider fit, start with GPT-4 Turbo (older v1106); if it depends on provider fit, run the same evaluation with Phi-4 Reasoning Vision 15B.
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Last reviewed: 2026-05-11. Data sourced from public model cards and provider documentation.