# Scaling Context Management: Comparing Fable 5 and GPT-5.5

DevFeed: [Scaling Context Management: Comparing Fable 5 and GPT-5.5](<https://devfeed.tech/articles/the-oracle-and-the-firm-37189.md>)

Original publisher: [Read original article](<https://calv.info/the-oracle-and-the-firm>)

Author: Calvin French-Owen

Published: 2026-06-13T12:00:00Z

Content type: opinion

Language: en

Sources: [Calvin French-Owen](<https://devfeed.tech/sources/calvin-french-owen.md>)

Topics: [long-context](<https://devfeed.tech/topics/long-context.md>), [codex](<https://devfeed.tech/topics/codex.md>), [Fable](<https://devfeed.tech/topics/fable.md>), [API](<https://devfeed.tech/topics/api.md>), [Caching](<https://devfeed.tech/topics/caching.md>), [GPU](<https://devfeed.tech/topics/gpu.md>)

Tags: [api](<https://devfeed.tech/tags/api.md>), [caching](<https://devfeed.tech/tags/caching.md>), [codex](<https://devfeed.tech/tags/codex.md>), [context](<https://devfeed.tech/tags/context.md>), [fable](<https://devfeed.tech/tags/fable.md>), [gpu](<https://devfeed.tech/tags/gpu.md>), [long-context](<https://devfeed.tech/tags/long-context.md>)

## AI overview

The article compares how Fable 5 and GPT-5.5 scale context management for difficult, long-running tasks. It describes Codex's server-side compaction approach and discusses its implications for clients and long-running threads.

## Source excerpt

Comparing two very different approaches to scaling context between Fable 5 and GPT 5.5.