GLM-4-Extreme vs Phi-4 Reasoning Vision 15B
GLM-4-Extreme (2024) and Phi-4 Reasoning Vision 15B (2026) are general-purpose language models from Tsinghua Knowledge Engineering Group (THUDM) and Microsoft Research. GLM-4-Extreme ships a not-yet-sourced 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 GLM-4-Extreme when provider fit matters.
Decision scorecard
Local evidence first| Signal | GLM-4-Extreme | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Decision fit | General | Vision |
| Context window | — | — |
| Cheapest output | - | - |
| Provider routes | 0 tracked | 0 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Use GLM-4-Extreme when your own prompt tests beat the comparison signals; the local data does not show a decisive standalone advantage yet.
- 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 prices on this page.
GLM-4-Extreme
Unavailable
No complete token price in local provider data
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 GLM-4-Extreme and Phi-4 Reasoning Vision 15B; plan for SDK, billing, or endpoint changes.
- 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 GLM-4-Extreme; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Multimodal before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-06-05 | 2026-03-12 |
| Context window | — | — |
| Parameters | — | 15B |
| Architecture | decoder only | - |
| License | Unknown | Microsoft Research |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | GLM-4-Extreme | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Input price | - | - |
| Output price | - | - |
| Providers | - | - |
Pricing not yet sourced for either model.
Capabilities
| Capability | GLM-4-Extreme | Phi-4 Reasoning Vision 15B |
|---|---|---|
| Vision | No | No |
| Multimodal | No | Yes |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | No | No |
| Code execution | 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. 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: GLM-4-Extreme has no token price sourced yet and Phi-4 Reasoning Vision 15B has no token price sourced yet. Provider availability is 0 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose GLM-4-Extreme when provider fit 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. For teams standardizing a stack, that distinction is often the difference between a benchmark win and a reliable deployment.
FAQ
Is GLM-4-Extreme or Phi-4 Reasoning Vision 15B open source?
GLM-4-Extreme is listed under Unknown. 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, GLM-4-Extreme 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.
When should I pick GLM-4-Extreme over Phi-4 Reasoning Vision 15B?
Phi-4 Reasoning Vision 15B is safer overall; choose GLM-4-Extreme when provider fit matters. If your workload also depends on provider fit, start with GLM-4-Extreme; if it depends on provider fit, run the same evaluation with Phi-4 Reasoning Vision 15B.
What is the main difference between GLM-4-Extreme and Phi-4 Reasoning Vision 15B?
GLM-4-Extreme and Phi-4 Reasoning Vision 15B differ most on context, provider coverage, capabilities, or pricing depending on the data currently sourced. Use the specs table first, then validate the model behavior with your own prompts.
Continue comparing
Last reviewed: 2026-04-19. Data sourced from public model cards and provider documentation.