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Model Timeline

Timeline of gpt-5.5

Every recorded change for this model by OpenAI, newest first. Back to the entity page →

4 events

Year

All years 2026

Category · events in the last 365 days

All categories Companies1,571 Models1,429 Research1,066 Releases1,016 Providers & pricing604 Datasets133 Frameworks66 Hardware33 Benchmarks27 Repositories10

Filtered to one entity. Show the whole atlas

Sept 20264

Sept 2026 4

11 Sept 2026
Listed by providerModelgpt-5.5OpenAI
OpenAI API lists gpt-5.5 at $2.5 in / $15 out per 1M tokens
openrouter
openrouter.ai

11 Sept 2026

Listed by providerModelgpt-5.5OpenAI

OpenAI API lists gpt-5.5 at $5 in / $30 out per 1M tokens

openrouter

openrouter.ai

11 Sept 2026

New modelModelgpt-5.5OpenAI

New model: gpt-5.5 (OpenAI)

openai

developers.openai.com

11 Sept 2026

Listed by providerModelgpt-5.5OpenAI

OpenAI API lists gpt-5.5 at $5 in / $30 out per 1M tokens

openai

developers.openai.com

Showing up to 400 events. Narrow by year or category, or use the changes feed for cursor-paged history. Times are UTC.