Claim

This addendum to the GPT-5 system card shares a new model: GPT-5-Codex, a version of GPT-5 further optimized for agentic coding in Codex. GPT-5-Codex adjusts its thinking effort more dynamically based on task complexity, responding quickly to simple conversational queries or small tasks, while independently working for longer on more complex tasks.

Oracle verdict

This is a low-signal vendor radar item. Keep it as context only unless a later benchmark, deployment, procurement change, or labour-market datapoint turns it into direct Appendix III evidence.

Why it matters

Imported from the official OpenAI release stream because it was published on or after the GPT-5 launch date (2025-08-07).

Open source Read thesis appendix

# CopeCheck Capabilities Register

Updated: 2026-07-16T00:00:00Z
Status: live_evidence_active

Question to ask a model: What do these capability claims mean for The Discontinuity Thesis?

Interpretation rule: treat each entry as evidence about capability, deployment, workflow recomposition, labour-market exposure, or institutional framing. Do not treat vendor optimism as neutral; separate the measurable capability claim from the comfort language around it.

## Addendum to GPT-5 system card: GPT-5-Codex
Source: https://openai.com/index/gpt-5-system-card-addendum-gpt-5-codex
Publisher: OpenAI
Category: Vendor framing
Sector: Software engineering
Capability: Frontier model release and benchmark movement
Score: 58/100
Claim: This addendum to the GPT-5 system card shares a new model: GPT-5-Codex, a version of GPT-5 further optimized for agentic coding in Codex. GPT-5-Codex adjusts its thinking effort more dynamically based on task complexity, responding quickly to simple conversational queries or small tasks, while independently working for longer on more complex tasks.
Oracle verdict: This is a low-signal vendor radar item. Keep it as context only unless a later benchmark, deployment, procurement change, or labour-market datapoint turns it into direct Appendix III evidence.
Thesis relevance: Appendix III, section two: vendor threshold and platform capability evidence