# Stack

LLM API comparisons and AI developer workflow guides. Every verdict is grounded in actual use.

> https://stack.lifeintraffic.com

Full verdict digest: https://stack.lifeintraffic.com/llms-full.txt

## LLM API Providers

- [LLM API Rate Limits — What to Expect in Production](https://stack.lifeintraffic.com/providers/llm-api-rate-limits/): Why token limits break production LLMs before request limits do—and how to fix it.
- [LLM API Latency Benchmarks — Which Is Actually Fastest?](https://stack.lifeintraffic.com/providers/llm-api-latency-benchmarks/): Compare real LLM API latency benchmarks across providers. See which actually delivers fastest response times in production.
- [LLM API Context Window Comparison](https://stack.lifeintraffic.com/providers/llm-api-context-window-comparison/): Real LLM context window performance beats advertised token counts. Compare actual usability across Gemini, Claude, and GPT models.
- [Best LLM API for Function Calling and Tool Use](https://stack.lifeintraffic.com/providers/best-llm-api-function-calling/): Best LLM API for function calling: Why Claude beats GPT-4 for production agents—and when to route calls
- [Best LLM API for Structured Output and JSON Mode](https://stack.lifeintraffic.com/providers/best-llm-api-structured-output/): JSON Mode won't save you — schema-constrained decoding will. Here's which LLM API actually enforces your schema in production.
- [Cohere API — Developer Review](https://stack.lifeintraffic.com/providers/cohere-api-developer-review/): Cohere API review: Where it actually wins in production RAG and why enterprises choose it over OpenAI.
- [Together AI API — Developer Review](https://stack.lifeintraffic.com/providers/together-ai-developer-review/): Together AI API: Fast, but not always best. Here's where it actually wins.
- [Groq API — Developer Review](https://stack.lifeintraffic.com/providers/groq-api-developer-review/): Groq API review: fastest LLM inference, but not for everyone. Here's when to use it.
- [Mistral AI API — Developer Review](https://stack.lifeintraffic.com/providers/mistral-api-developer-review/): Mistral API review: competitive pricing and coding chops, but watch the structured output gotchas
- [Google Gemini API — Developer Review](https://stack.lifeintraffic.com/providers/gemini-api-developer-review/): Gemini API review: powerful models, frustrating integration quirks revealed in production.
- [Anthropic Claude API — Developer Review](https://stack.lifeintraffic.com/providers/claude-api-developer-review/): Claude API excels at code generation but hits unexpected usage caps—a real developer review.
- [OpenAI API — Developer Review](https://stack.lifeintraffic.com/providers/openai-api-developer-review/): OpenAI API review: where it excels, its tradeoffs, and when competitors win
- [Best AI Tools for Developers in 2026](https://stack.lifeintraffic.com/providers/best-ai-tools-developers/): Claude Code on Opus 4.8 is the clear pick for serious dev work in 2026. Here's why — and the case against reaching for the cheaper model.
- [Best LLM APIs for Developers](https://stack.lifeintraffic.com/providers/best-llm-apis-developers/): OpenAI for reliability, Anthropic for coding and long context, OpenRouter for multi-model routing. A practical framework — and a case for not over-optimizing.

## AI Developer Workflows

- [Best AI for Writing PR Descriptions](https://stack.lifeintraffic.com/workflows/best-ai-pr-descriptions/): Compare AI tools for PR descriptions—GitHub Copilot, accuracy rates, and why constraints matter more than speed.
- [Best AI for Writing Commit Messages](https://stack.lifeintraffic.com/workflows/best-ai-commit-messages/): Discover which AI tools reliably write commit messages—and which ones will corrupt your git history without warning.
- [AI for Architecture Planning — Complete Guide](https://stack.lifeintraffic.com/workflows/ai-architecture-planning/): AI won't design your system for you—but it's the best sparring partner you'll find. Here's how.
- [AI for Security Code Review — Complete Guide](https://stack.lifeintraffic.com/workflows/ai-security-code-review/): AI code review catches bugs, not design flaws. Here's what it actually secures—and what it doesn't.
- [AI for Code Refactoring — Complete Guide](https://stack.lifeintraffic.com/workflows/ai-refactoring/): AI code refactoring cuts tedious cleanup to seconds—but read this before trusting it with production code.
- [AI for Documentation — Complete Guide](https://stack.lifeintraffic.com/workflows/ai-documentation/): Master AI-generated docs without shipping broken references. Learn the pitfalls and proven workflows.
- [AI for Debugging — Complete Guide](https://stack.lifeintraffic.com/workflows/ai-debugging/): Master AI debugging: learn the context-first workflow that collapses hours of debugging into minutes—and avoid hallucinations that waste your time.
- [AI for Writing Tests — Complete Guide](https://stack.lifeintraffic.com/workflows/ai-writing-tests/): AI writes passing tests—not good ones. Learn when to use it without getting burned.
- [AI for Code Review — Complete Guide](https://stack.lifeintraffic.com/workflows/ai-code-review/): Master AI code review as a thinking partner, not a gatekeeper. Learn what actually works.
- [AI Tools for Developer Workflows](https://stack.lifeintraffic.com/workflows/ai-tools-developer-workflows/): The biggest AI time-saves aren't in autocomplete. They're in Claude Code wired to Slack, Jira, and Confluence — here's where the time actually comes from.