LLM API pricing

chat API pricing: cheapest provider

2 providers sell chat. OpenAI is cheapest, and listed prices are close.

Cheapest$11.25per 1M · OpenAI
Input · output$5.00 / $30.00per 1M tokens
Price gap1.0×across 2 providers
Context400Kmax tokens

$11.25 OpenAIclose prices$11.25 Microsoft Azure AI Foundry

Compare all 2 providers ⇄ Compare with another model

Already paying for chat? Check if you overpay →

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

chat 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	Cached input / 1M	Context
1 Microsoft Azure AI FoundryCloud platform - lowest for your volumePricing page	$110.00	$5.00	$30.00	$0.50	272,000
2 OpenAIAI platformPricing page	$110.00	$5.00	$30.00	$0.50	400,000

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.

Share this comparison as a Markdown table

For a post, a doc or a forum answer. The source line links back here, so readers can check today's prices.

Markdown

| chat provider | Input / 1M tokens | Output / 1M tokens | 10M in + 2M out per month |
|---|---:|---:|---:|
| Microsoft Azure AI Foundry | $5.00 | $30.00 | $110.00 |
| OpenAI | $5.00 | $30.00 | $110.00 |

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

Price history

The cheapest price has not changed since tracking started on Sep 28, 2026: $11.25 per 1M tokens at OpenAI. All price changes

Compare chat with another model

Or pick any model

Model A

Model B

Before you pick a provider

Context windows differ by provider, from 272K to 400K tokens. A cheaper host may not accept your longest prompts.

2 of 2 providers list a cached-input price. Repeated system prompts or documents can cost much less there than the standard input rate shown above.

Keep comparing

More LLM API prices

All LLM API prices - Watch chat prices (RSS) - Methodology