gpt-3.5-turbo-instruct

deprecatedproprietary

Similar capabilities as GPT-3 era models. Compatible with legacy Completions endpoint and not Chat Completions. · Succeeded by gpt-5.6-terra

Intelligence
Speed
Context
16K
Max output
4K
Input price
$0.5/1M tokens
Output price
$1.5/1M tokens
Alias ofgpt-3.5-turbo

Capabilities

Infrastructure
Batch Processing
Fine-tuning

Details

Provider OpenAI
Creator openai
Familygpt-3.5
Licenseproprietary
Statusdeprecated
Typechat
Input modalitiestext
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window16K tokens
Max input—
Max output4K tokens
Reasoning tokens—
Knowledge cutoff
Release date
Deprecation date
Retirement date
Successorgpt-5.6-terra
Sourceofficial

Endpoints

Chat CompletionsPOST
Generate chat responses with messageshttps://api.openai.com/v1/chat/completions
ResponsesPOST
Stateful multi-turn conversationshttps://api.openai.com/v1/responses
BatchPOST
Async batch processing at lower costhttps://api.openai.com/v1/batches
Fine-tuningPOST
Train custom models on your datahttps://api.openai.com/v1/fine_tuning/jobs

Pricing

Text tokensPer 1M tokens
InputOutput
Standard$0.5$1.5
Fine-tuning
TrainingInputCached inputOutput
Standard$8$3—$6
Batch$8$1.5—$3

Family Comparison: gpt-3.5

ModelContextMax outPricing
gpt-3.5-030116K4K—
gpt-3.5-turbo-061316K4K—
GPT-3.5 Turbo16K4K$0.5$1.5
gpt-3.5-turbo-16k-061316K4K$3$4

API

GET/v1/models/openai/gpt-3.5-turbo-instruct

gpt-3.5-turbo-instruct

deprecated

Similar capabilities as GPT-3 era models. Compatible with legacy Completions endpoint and not Chat Completions.

alias → gpt-3.5-turbogpt-3.5-turbo-instruct
Changes · 10 entries
gpt-3.5-turbo-instructupdateca7a400Nov 2, 2026, 03:02 AM
context_window4096→16385
capabilitiesbatchyes
pricingtiers[{"label":"Text tokens","unit":"","columns":["Input","Out...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...input$1.5→$0.5output$2→$1.5batch input$0.25batch output$0.75
endpoints["chat_completions","responses"]→["chat_completions","responses","batch","fine_tuning"]
page_urlhttps://developers.openai.com/api/docs/models/gpt-3-5-tur...→https://developers.openai.com/api/docs/models/gpt-3.5-tur...
deprecation_date2025-09-26
retirement_date2026-09-28
aliasgpt-3.5-turbo
successorgpt-5.6-terra
gpt-3.5-turbo-instructupdate4e8b6afOct 21, 2026, 06:35 AM
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...input$1.5→$0.5output$2→$1.5
gpt-3.5-turbo-instructupdate118451aSep 24, 2026, 07:08 AM
context_window4096→16385
pricingtiers[{"label":"Text tokens","unit":"","columns":["Input","Out...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...batch input$0.25batch output$0.75
endpoints["chat_completions","responses"]→["chat_completions","responses","batch","fine_tuning"]
page_urlhttps://developers.openai.com/api/docs/models/gpt-3-5-tur...→https://developers.openai.com/api/docs/models/gpt-3.5-tur...
deprecation_date2025-09-26
retirement_date2026-09-28
aliasgpt-3.5-turbo
successorgpt-5.6-terra
gpt-3.5-turbo-instructupdatee8ec634Mar 24, 2026, 07:27 PM
knowledge_cutoff2021-08→2021-09
gpt-3.5-turbo-instructupdatef43e286Mar 24, 2026, 04:45 AM
capabilitiesstreamingnovisionnotool callnostructured outputnojson modenoreasoningno
gpt-3.5-turbo-instructupdate1cd659eMar 24, 2026, 04:19 AM
knowledge_cutoff2021-09→2021-08
page_urlhttps://platform.openai.com/docs/models/gpt-3-5-turbo-ins...→https://developers.openai.com/api/docs/models/gpt-3-5-tur...
gpt-3.5-turbo-instructupdateb301ebeMar 23, 2026, 11:47 PM
knowledge_cutoff2021-08→2021-09
gpt-3.5-turbo-instructupdate2b100acMar 23, 2026, 05:30 AM
licenseproprietary
page_urlhttps://platform.openai.com/docs/models/gpt-3-5-turbo-ins...
open_weightno
gpt-3.5-turbo-instructupdateb50649fMar 21, 2026, 11:58 PM
statusactive→deprecated
descriptionThis model is a variant of GPT-3.5 Turbo tuned for instru...→Similar capabilities as GPT-3 era models. Compatible with...
capabilitiesstructured outputyesfine tuningyes
knowledge_cutoff2021-08
model_typechat
taglineAn older model only compatible with the legacy Completion...
pricingtiers[{"label":"Text tokens","unit":"","columns":["Input","Out...input$1.5output$2
endpoints["chat_completions","responses"]
snapshots["gpt-3.5-turbo-instruct"]
gpt-3.5-turbo-instructcreate7f5c66fMar 21, 2026, 05:16 AM