openai/gpt-3.5-turbo-instruct

Served by OpenAI
errors out

openai serves 13 models.

Tracking status

LTprobe failed — This endpoint claims logprob support, but our probe could not obtain usable logprobs. (HTTP 404: The model `gpt-3.5-turbo-instruct` has been deprecated, learn more here: https://platform.openai.com/docs/deprecations)
B3ITunprobeable · flaky — Our vetting probes of this endpoint persistently fail. (HTTP 404: the provider returned an error)

Endpoint details

from the OpenRouter catalog snapshot
Pricing (per Mtok)
$1.50 in · $2.00 out
Listed since
2023-09-28
Claims temperature
yes
Claims logprobs
yes

Spend

what OpenRouter billed for tracking this endpoint. Spend recorded since 2026-06-24
Total to date
$0.0019
Last 30 days
$0.000062
Queries
134
  • Vetting$0.0019100%
Vetting is the one-off probe that checks the endpoint's billed cost against its advertised price. B3IT (onboarding) is the initial border-input search; B3IT (monitoring) and LT are the recurring daily checks.

Timothée Chauvin, Erwan Le Merrer, François Taïani, Gilles Tredan (2026), "Log Probability Tracking of LLM APIs". ICLR 2026. https://arxiv.org/abs/2512.03816

Timothée Chauvin, Clément Lalanne, Erwan Le Merrer, Jean-Michel Loubes, François Taïani, Gilles Tredan (2026), "Token-Efficient Change Detection in LLM APIs". ICML 2026. https://arxiv.org/abs/2602.11083

@inproceedings{
chauvin2026log,
title={Log Probability Tracking of {LLM} {API}s},
author={Timothee Chauvin and Erwan Le Merrer and Francois Taiani and Gilles Tredan},
booktitle={The Fourteenth International Conference on Learning Representations},
year={2026},
url={https://openreview.net/forum?id=hFxivbAgVP}
}

@inproceedings{
chauvin2026tokenefficient,
title={Token-Efficient Change Detection in {LLM} {API}s},
author={Timothee Chauvin and Cl{\'e}ment Lalanne and Erwan Le Merrer and Jean-Michel Loubes and Francois Taiani and Gilles Tredan},
booktitle={Forty-third International Conference on Machine Learning},
year={2026},
url={https://openreview.net/forum?id=7cMlZZYZT0}
}