LLM API pricing

Phi-4 API pricing: cheapest provider

2 providers sell Phi-4. DeepInfra is cheapest; the most expensive charges 2.5× as much for the same model.

Cheapest$0.0875per 1M · DeepInfra
Input · output$0.07 / $0.14per 1M tokens
Price gap2.5×across 2 providers
Accuracy56.1%GPQA
Context16Kmax tokens

$0.0875 DeepInfra2.5× spread$0.2188 Microsoft Azure AI Foundry

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Standard list prices in USD from each provider's pricing page · last price change Sep 28, 2026 · How we collect and rank prices

Ranked for your volume

Phi-4 monthly cost by provider

Change the monthly tokens and the ranking updates instantly, using each provider's standard list price.

Input tokens per month (millions)Prompts, context and documents you send.Output tokens per month (millions)Tokens the model generates.

More requirements: caching, context, features, provider

Cached share of input (%)0 = no caching. Only documented cache-read rates qualify.Required context per request (tokens)0 = any. Providers without a sufficient known limit are excluded.Required featureProvider requirement

Provider	Estimated / month	Input / 1M	Output / 1M	Context
1 DeepInfraInference provider - lowest for your volumePricing page	$0.98	$0.07	$0.14	16,384
2 Microsoft Azure AI FoundryCloud platformPricing page	$2.25	$0.125	$0.50	16,384

Order depends on listed price for your volume only. No provider pays for its position.

Input volume includes the cached share, not an additional token volume. This is a list-price estimate, not a quote: cache-write charges, cache eligibility/TTL, batch discounts, long-context surcharges, regional pricing and taxes are excluded. Check the provider's terms for your workload before switching.

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| Phi-4 provider | Input / 1M tokens | Output / 1M tokens | 10M in + 2M out per month |
|---|---:|---:|---:|
| DeepInfra | $0.07 | $0.14 | $0.98 |
| Microsoft Azure AI Foundry | $0.125 | $0.50 | $2.25 |

Standard list prices as of Oct 31, 2026. Source: [AISelect.online](https://aiselect.online/models/phi-4)

Accuracy: GPQA Diamond (graduate-level science questions) measured by Epoch AI (CC BY 4.0) on phi-4, run Jan 31, 2025. The model is the same at every provider, though quantized deployments can score lower.

Price history

The cheapest price has not changed since tracking started on Sep 28, 2026: $0.0875 per 1M tokens at DeepInfra. All price changes

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Already using the OpenAI SDK? Change the base URL, key and model name:

from openai import OpenAI
import os

client = OpenAI(
    base_url="https://api.deepinfra.com/v1/openai",
    api_key=os.environ["DEEPINFRA_API_KEY"],
)
response = client.chat.completions.create(
    model="microsoft/phi-4",
    messages=[{"role": "user", "content": "Hello"}],
)

Base URL from DeepInfra's API docs, model name from the open pricing datasets. Check the model page in DeepInfra's docs before you switch production traffic.

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