OpenAI Codex vs Anthropic API
Compare coding AI Tools
10% Similar based on 1 shared tag
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OpenAI Codex
Coding agent and code generation assistant available via ChatGPT subscriptions and the OpenAI API with IDE CLI and web access for development tasks.
Pricing ChatGPT Plus $20 per month
Category coding
Difficulty Beginner
Type Web App
Status Active
Anthropic API
Programmatic access to Anthropic models for chat completion tool use and batch jobs with usage based pricing and enterprise controls across regions and clouds.
Pricing Usage based, from approx $0.25 per 1M tokens input on Haiku
Category coding
Difficulty Beginner
Type Web App
Status Active
Feature Tags Comparison
Only in OpenAI Codex
codingagentidecli
Shared
api
Only in Anthropic API
llmclaudetool-usebatchstreaming
Key Features
OpenAI Codex
- • Agentic coding sessions in terminal IDE and web with logs and artifacts
- • GPT 5 Codex models focused on code review generation and refactoring
- • Pull request reviews with inline suggestions and explainers
- • Tests and bug fixes drafted from failing outputs and traces
- • CLI and extensions to connect repos private or cloud sandboxes
- • Responses API access to Codex models for programmatic control
Anthropic API
- • Chat completion endpoints with tool use for function calling
- • Large context windows for retrieval heavy prompts
- • Prompt caching to cut cost on repeated system headers
- • Batch API for discounted offline processing at scale
- • Streaming responses for responsive front ends
- • SDKs for Python JavaScript and partner cloud gateways
Use Cases
OpenAI Codex
- → Draft new features from structured tickets with commit level traceability
- → Request refactors to modern patterns while preserving behavior
- → Generate tests from examples and failing logs to raise coverage
- → Review pull requests with inline reasoning and citation to changes
- → Explain unfamiliar code paths during onboarding or audits
- → Automate repetitive tasks like renames and boilerplate creation
Anthropic API
- → Build customer support copilots with reliable tool calling
- → Create research assistants that summarize long documents
- → Add coding helpers to IDE like environments
- → Generate analytics narratives from dashboards and logs
- → Process large archives via Batch for overnight runs
- → Prototype assistants on small models then scale up
Perfect For
OpenAI Codex
software engineers data engineers platform teams educators and students who need guided coding help code review and safe automation inside familiar tools
Anthropic API
product engineers data teams and platform groups building assistants analytics and agents that need reliable Claude access with cost controls
Capabilities
OpenAI Codex
Agentic sessions Professional
Pull requests Professional
Structure and tests Intermediate
API and CLI Intermediate
Anthropic API
Tool Use Functions Professional
Batch and Caching Professional
Realtime Output Basic
Projects and Policies Intermediate
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