gpt-3.5-turbo

GPT-3.5 Turbo — priced by OpenAI.

Jurisdiction US
Context window 16,385 tokens
Provider OpenAI
Tiers priced 2

Published tiers

What the most recent complete run published for this model, one row per priced tier, each with the source it was read from.

Tier	Input USD/1M	Output USD/1M	Last read	Read from	Flags
batch	0.25	0.75	just now	OpenRouter models API	confirmedsingle source
flat	0.5	1.5	just now	OpenAI API pricing (docs)	confirmedcorroborated

This model on the price scale0.25 to 1.5 across 4 published values

The same six decades as the front page, so a price is in the same place here as it is anywhere else on this site. The two marks in the accent colour are this model’s cheapest and dearest published values.

Price history

Every distinct value this price has taken, oldest first — what the price did, not how often we happened to look. Rows marked backfill came from a public git history of a third-party pricing file and were never verified by us; they extend the series backwards and are flagged rather than hidden.

batch

1 distinct value

One value across the whole archive: this price has not moved in anything we have observed.

Held steady63 days — the value published now has been observed to hold for 63 days, which is 17% of the longest run on this page.

Input 0.25
Output 0.75
First seen 2026-08-15 23:13Z
Last seen 2026-10-17 12:00Z
Reads 69
Last read 2026-10-17 12:00Z
Source OpenRouter models API

flat

6 distinct values

Held steady369 days — the value published now has been observed to hold for 369 days, which is 100% of the longest run on this page.

inputoutput2 windows nobody looked inhorizontal axis is time

Input low 0.5 · high 1.5 high from backfill
Output low 1.5 · high 2 high from backfill
Observed 2023-09-20 20:39Zto 2025-10-13 05:07Z

First seen	Last seen	Input USD/1M	Output USD/1M	Reads	Source	Last read	Flags
2023-09-20 20:39Z	2023-09-20 20:39Z	1.5	2	1	LiteLLM model_prices_and_context_window.json (git history)	never	backfillunconfirmed
2025-09-24 12:32Z	2025-09-24 12:32Z	0.5	1.5	1	LiteLLM model_prices_and_context_window.json (git history)	never	backfillunconfirmed
2025-09-24 16:58Z	2025-09-24 16:58Z	1.5	2	1	LiteLLM model_prices_and_context_window.json (git history)	never	backfillunconfirmed
2025-09-26 06:47Z	2025-09-26 06:47Z	0.5	1.5	1	LiteLLM model_prices_and_context_window.json (git history)	never	backfillunconfirmed
2025-10-13 02:46Z	2025-10-13 02:46Z	1.5	2	1	LiteLLM model_prices_and_context_window.json (git history)	never	backfillunconfirmed
2025-10-13 05:07Z	2026-10-17 12:00Z	0.5	1.5	74	OpenAI API pricing (docs)	2026-10-17 12:00Z

Provenance

Read by openai_astro_props (flat) and openrouter_json (batch) from OpenAI API pricing (docs), OpenRouter models API. Each row above links to the exact page its number came from. The vendor's page is authoritative: if it and this page disagree, the vendor is right and we are wrong.