OpenAI Python SDK v2.23.0 adds GPT-4 Realtime 1.5 and Audio 1.5 model support

OpenAI Python SDK v2.23.0 Released

OpenAI released version 2.23.0 of its Python SDK on February 24, 2026, introducing support for two new model variants in realtime API operations.

New Models Available

The release adds gpt-realtime-1.5 and gpt-audio-1.5 as available model options for realtime calls. These additions expand developer access to OpenAI's latest real-time capable models through the Python SDK.

The specific capabilities, pricing, and context window details for these models were not disclosed in the SDK release notes. Developers will need to consult OpenAI's API documentation for full technical specifications.

Changes Summary

Features:

• Added gpt-realtime-1.5 and gpt-audio-1.5 model options to realtime calls

Maintenance:

• Improved test resilience for proxy environment variables

What This Means

This update primarily serves as infrastructure expansion rather than a breaking change. Developers using the Python SDK can now specify these newer model variants when building real-time applications. The inclusion of both realtime and audio-specific model options suggests OpenAI is differentiating between audio streaming capabilities and general real-time interaction patterns.

Minor version increments like this are typical for SDK releases that add new model availability without changing API behavior or introducing breaking changes.