Add support for token usage reporting for Azure endpoint

What version of Codex is running?

codex-cli 0.29.0

Which model were you using?

gpt-5

What platform is your computer?

Darwin 24.6.0 arm64 arm

What steps can reproduce the bug?

Use an azure deployment. Here's my config.toml (deployment name redacted):

model_provider = "azure"
model = "gpt-5"

[model_providers.azure]
name = "Azure"
base_url = "https://redacted.openai.azure.com/openai/deployments/gpt-5"
env_key = "AZURE_OPENAI_API_KEY"
query_params = { api-version = "2024-12-01-preview" }
# wire_api = "chat"
model_reasoning_summary = "detailed"

What is the expected behavior?

I should see tokens used in the session after I send messages.

What do you see instead?

📂 Workspace
  • Path: ~/Projects/ti
  • Approval Mode: on-request
  • Sandbox: workspace-write
  • AGENTS files: AGENTS.md

🧠 Model
  • Name: gpt-5
  • Provider: Azure

📊 Token Usage
  • Session ID: a249b4c6-57e0-4a3c-8288-428ee9b323de
  • Input: 0
  • Output: 0
  • Total: 0

Additional information

I also don't see context remaining either.