Phi 4 Multimodal Instruct vs Prompt Guard 86M
Phi 4 Multimodal Instruct (2025) and Prompt Guard 86M (2024) are compact production models from Microsoft Research and AI at Meta. Phi 4 Multimodal Instruct ships a 128K-token context window, while Prompt Guard 86M ships a 512-token context window. On pricing, Prompt Guard 86M costs $0.05/1M input tokens versus $0.9/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Prompt Guard 86M is ~1700% cheaper at $0.05/1M; pay for Phi 4 Multimodal Instruct only for long-context analysis.
Decision scorecard
Local evidence first| Signal | Phi 4 Multimodal Instruct | Prompt Guard 86M |
|---|---|---|
| Decision fit | Long context and Vision | General |
| Context window | 128K | 512 |
| Cheapest output | $0.9/1M tokens | $0.05/1M tokens |
| Provider routes | 3 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Phi 4 Multimodal Instruct has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Phi 4 Multimodal Instruct has broader tracked provider coverage for fallback and procurement flexibility.
- Phi 4 Multimodal Instruct uniquely exposes Vision and Multimodal in local model data.
- Local decision data tags Phi 4 Multimodal Instruct for Long context and Vision.
- Prompt Guard 86M has the lower cheapest tracked output price at $0.05/1M tokens.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
Phi 4 Multimodal Instruct
$945
Cheapest tracked route: Fireworks AI
Prompt Guard 86M
$52.50
Cheapest tracked route: Microsoft Foundry
Estimated monthly gap: $893. Batch, cache, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on Microsoft Foundry; start route-level A/B tests there.
- Prompt Guard 86M is $0.85/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
- Provider overlap exists on Microsoft Foundry; start route-level A/B tests there.
- Phi 4 Multimodal Instruct is $0.85/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Phi 4 Multimodal Instruct adds Vision and Multimodal in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-01-01 | 2024-07-23 |
| Context window | 128K | 512 |
| Parameters | — | 279M |
| Architecture | decoder only | decoder only |
| License | Open Source | Unknown |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Phi 4 Multimodal Instruct | Prompt Guard 86M |
|---|---|---|
| Input price | $0.9/1M tokens | $0.05/1M tokens |
| Output price | $0.9/1M tokens | $0.05/1M tokens |
| Providers |
Capabilities
| Capability | Phi 4 Multimodal Instruct | Prompt Guard 86M |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| 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 vision: Phi 4 Multimodal Instruct and multimodal input: Phi 4 Multimodal Instruct. 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.
For cost, Phi 4 Multimodal Instruct lists $0.9/1M input and $0.9/1M output tokens, while Prompt Guard 86M lists $0.05/1M input and $0.05/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Prompt Guard 86M lower by about $0.85 per million blended tokens. Availability is 3 providers versus 1, so concentration risk also matters.
Choose Phi 4 Multimodal Instruct when long-context analysis, larger context windows, and broader provider choice are central to the workload. Choose Prompt Guard 86M when provider fit and lower input-token cost 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
Which has a larger context window, Phi 4 Multimodal Instruct or Prompt Guard 86M?
Phi 4 Multimodal Instruct supports 128K tokens, while Prompt Guard 86M supports 512 tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Phi 4 Multimodal Instruct or Prompt Guard 86M?
Prompt Guard 86M is cheaper on tracked token pricing. Phi 4 Multimodal Instruct costs $0.9/1M input and $0.9/1M output tokens. Prompt Guard 86M costs $0.05/1M input and $0.05/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Phi 4 Multimodal Instruct or Prompt Guard 86M open source?
Phi 4 Multimodal Instruct is listed under Open Source. Prompt Guard 86M is listed under Unknown. 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, Phi 4 Multimodal Instruct or Prompt Guard 86M?
Phi 4 Multimodal Instruct has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Phi 4 Multimodal Instruct or Prompt Guard 86M?
Phi 4 Multimodal Instruct 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.
Where can I run Phi 4 Multimodal Instruct and Prompt Guard 86M?
Phi 4 Multimodal Instruct is available on Fireworks AI, NVIDIA NIM, and Microsoft Foundry. Prompt Guard 86M is available on Microsoft Foundry. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-05-16. Data sourced from public model cards and provider documentation.