Tool, Effort & Profile Flags

Flags for selecting the AI runtime, controlling reasoning effort, and choosing provider configurations.

Runtime Selection

flag

Select AI runtime by name

ai --tool cc task.md        # Claude Code
ai --tool codex task.md     # Codex CLI

If not specified, AI Runner auto-detects: tries Claude Code first, falls back to Codex CLI.

flag

Claude Code — Anthropic’s AI coding CLI (default if installed)

ai --cc                     # Interactive Claude Code session
ai --cc --aws --opus        # Claude Code with AWS Bedrock
ai --cc task.md             # Execute script with Claude Code

Shorthand for --tool cc. This is the default runtime when both are installed.

flag

Codex CLI — OpenAI’s coding agent

ai --codex                  # Interactive Codex session
ai --codex --high           # Codex with gpt-5.4
ai --codex task.md          # Execute script with Codex
ai --codex --ollama         # Codex with local Ollama

Shorthand for --tool codex.Authentication: Codex uses browser login by default (codex login). Set OPENAI_API_KEY or CODEX_API_KEY for API key auth, or use --apikey to require it.Install:

npm install -g @openai/codex
# Or on macOS:
brew install --cask codex

Effort Level

flag

Reasoning effort — control how deeply the model thinks

ai --effort low task.md       # Minimal reasoning (fast)
ai --effort medium task.md    # Balanced (default)
ai --effort high task.md      # Deep reasoning
ai --effort max task.md       # Maximum reasoning

Works with both runtimes. AI Runner maps to each tool’s native format:

AI Runner	Claude Code	Codex CLI
`low`	`--effort low`	`-c model_reasoning_effort=low`
`medium`	`--effort medium`	`-c model_reasoning_effort=medium`
`high`	`--effort high`	`-c model_reasoning_effort=high`
`max`	`--effort max` (Opus only)	`-c model_reasoning_effort=xhigh`

Note: Claude Code’s max is Opus 5 only. Codex has additional levels (none, minimal) not exposed via AI Runner.Combine with other flags:

ai --codex --high --effort max task.md
ai --aws --opus --effort high task.md

Save as default:

ai --effort high --set-default

Provider Profile

flag

Select a config profile — Codex CLI only

ai --codex --profile azure task.md        # Azure OpenAI
ai --codex --profile openrouter task.md   # OpenRouter

Selects a named profile from ~/.codex/config.toml. Use this for providers that aren’t built into AI Runner’s flag system (OpenRouter, Mistral, DeepSeek, xAI, Groq, etc.).Setup — configure profiles in ~/.codex/config.toml:

[profiles.azure]
model_provider = "azure"
model = "gpt-5.3-codex"

[model_providers.azure]
name = "Azure OpenAI"
base_url = "https://YOUR_RESOURCE.openai.azure.com/openai/v1"
env_key = "AZURE_OPENAI_API_KEY"

[model_providers.openrouter]
name = "OpenRouter"
base_url = "https://openrouter.ai/api/v1"
env_key = "OPENROUTER_API_KEY"

See the Codex CLI docs for the full config reference.

Examples

Save Runtime as Default

# Always use Codex with the flagship model
ai --codex --high --set-default

# Always use Claude Code on AWS
ai --cc --aws --opus --set-default

# Clear — back to auto-detect
ai --clear-default

Shebang Scripts

#!/usr/bin/env -S ai --codex --high --effort high
Deep analysis of this codebase architecture.

#!/usr/bin/env -S ai --cc --opus --effort max
Maximum reasoning for this security audit.

Combining Flags

# Codex with Azure OpenAI profile and high effort
ai --codex --profile azure --effort high task.md

# Claude Code with AWS, Opus, and auto permissions
ai --aws --opus --effort high --auto task.md

Runtimes

Full cross-interpreter compatibility reference

Provider Flags

Switch between cloud providers

​Runtime Selection

​Effort Level

​Provider Profile

​Examples

​Save Runtime as Default

​Shebang Scripts

​Combining Flags

​Related Pages

Runtimes

Provider Flags

Runtime Selection

Effort Level

Provider Profile

Examples

Save Runtime as Default

Shebang Scripts

Combining Flags

Related Pages