Phi 3.5 Mini Instruct
Phi 3.5 Mini Instruct is worth evaluating for long context when its provider route and context window match the workload.
Use it for
- Teams evaluating long context
- Workloads that can use a 128k context window
- Buyers comparing 2 tracked provider routes
Do not use it for
- Vision or document-understanding workloads
- Strict JSON or tool-calling flows
Advancing the state-of-the-art in AI and computing.
Cheapest of 2 routes · Fireworks AI
About
Phi 3.5 Mini Instruct is Microsoft Research's Phi-3 model. It offers a 128K-token context window with weights openly available for self-hosting.
Phi 3.5 Mini Instruct is an open-source model in the Phi-3 family. The structured metadata tracks a 128k-token context window. This page tracks provider routes through Fireworks AI and NVIDIA NIM, with the cheapest tracked route listed at $0.9 input and $0.9 output per 1M tokens. No headline benchmark score is tracked for Phi 3.5 Mini Instruct yet.
Top use-case fit
Long context
Included by capability and metadata signals in the decision map.
Provider price ladder
Compare all 2Compare API pricing across 2 providers for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Route |
|---|---|---|---|
| Fireworks AI | $0.900 | $0.900 | Serverless |
| NVIDIA NIM | - | - | ServerlessPartial |
Available via routers & gateways(2)
OpenRouter
HybridUnified hybrid gateway to 400+ models from 60+ providers via a single OpenAI-compatible API, with optional auto-routing that selects the best model per prompt.
NVIDIA LLM Router Blueprint
RouterNVIDIA's open-source AI blueprint for LLM routing that selects the optimal model per prompt via intent classification or neural auto-routing; being deprecated 2026-06-20.
Capabilities
No model capability flags are currently sourced.
Benchmark peer barsfor Long context
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
Compare Phi 3.5 Mini Instruct with other models
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- Phi 3.5 Mini Instruct vs Gemini 2.5 Flash23
- Phi 3.5 Mini Instruct vs Llama 3 70B Instruct23
- Phi 3.5 Mini Instruct vs Gemini 2.5 Pro20
- Phi 3.5 Mini Instruct vs Mixtral 8x7B10
- Phi 3.5 Mini Instruct vs Mixtral 8x22B v0.110
Comparison and alternatives
Browse all comparisons →Frequently asked questions
What is the context window of Phi 3.5 Mini Instruct?
Phi 3.5 Mini Instruct has a context window of 128k tokens.
How much does Phi 3.5 Mini Instruct cost?
Phi 3.5 Mini Instruct is available at $0.9/1M input tokens through Fireworks AI.
When was Phi 3.5 Mini Instruct released?
Phi 3.5 Mini Instruct was released on 2024-08-20.
Which providers offer Phi 3.5 Mini Instruct?
Phi 3.5 Mini Instruct is available from 2 providers: Fireworks AI, NVIDIA NIM.
Advancing the state-of-the-art in AI and computing.
Cheapest of 2 routes · Fireworks AI