Fix any AI API error in seconds
Every documented error across Claude, GPT, Gemini, Bedrock, Azure OpenAI, Mistral, and Cohere — with the fix, curated by working engineers.
Popular: Claude 429 · OpenAI JSON parse · Gemini quota · Claude 529
Featured Pillar Guides
The comprehensive references teams reach for when things break in production.
Handling Rate Limits Across AI APIs
Tier structures, retry patterns, and proactive smoothing for Anthropic, OpenAI, and Gemini rate limits.
G8 · JSONStructured Output Reliability — Zero JSON Errors
The 4-category failure taxonomy, schema design principles, Pydantic/Zod validation, and repair patterns.
G7 · Tool UseFunction Calling Reliability Patterns
Tool schema design, argument validation, retry logic, and the 10 bugs that break tool-use pipelines in production.
G4 · Multi-providerFallback Strategies: Claude → GPT → Gemini
Automatic failover, health tracking, cost-aware routing, and multi-provider load balancing patterns.
G10 · CostAI Chatbot Cost Guide 2026
LLM API cost breakdowns, optimization techniques that cut bills 60-90%, and unit economics for chatbot businesses.
G9 · Retry mathExponential Backoff Explained with Working Code
The math and code for retry timing that handles network failures without amplifying load.
Every Major AI Provider, Every Documented Error
Current model catalogs, tier structures, and complete error references — kept current.
Anthropic
Opus 5 · Sonnet 4.6 · Haiku 4.5
OpenAI
GPT-5.6 · Mini · GPT-5 · o5
Google Gemini
3.5 Pro · Flash · 3 Ultra · Nano
AWS Bedrock
Claude · Llama 4 · Mistral · Titan
Azure OpenAI
GPT-5.6 · Mini · GPT-5 · o5
Mistral AI
Large 3 · Medium 3 · Codestral 2
Cohere
Command R+ · Embed v4 · Rerank 4
Browse Errors by Type
12 category hubs organizing every error across all providers by what actually broke.
Rate Limits
Cross-provider
Authentication
Cross-provider
Context Window
Overflow & limits
Timeouts
Read, write, stream
Content Filter
Safety & policy
Streaming
SSE, chunk, disconnect
Tool Use
24 errors
Structured Output
22 errors
Model Errors
19 errors
Quota & Billing
16 errors
Network Errors
18 errors
Parsing Errors
16 errors
Interactive Utilities for Builders
No signup, no ads. Just tools that work.
Practical Patterns from Working Engineers
Deep-dive articles, comparison reviews, and production playbooks.
Bulletproof Claude API Wrapper (with code)
The complete wrapper pattern for Claude — retry, timeout, error classification, metrics — as a single decorator layer.
Tutorial · CodeMulti-Provider Load Balancer for AI APIs
The complete load-balancer pattern with automatic failover across Anthropic, OpenAI, and Gemini plus cost-aware routing.
Review · 2026GPT-5.6 vs Claude Sonnet vs Gemini — 2026 Comparison
Head-to-head on reasoning, coding, tool use, structured output, cost, and latency across the three 2026 flagships.
PlaybookAI API Cost Optimization Playbook 2026
The full optimization stack — prompt caching, model routing, context compression, and batch APIs — that cuts bills 60-90%.
PlaybookBuilding Reliable AI Agents — Production Playbook 2026
Agent architecture patterns, failure modes, observability, and the 15 things production agents need before day one.
SecurityAI Security Playbook — Prompt Injection & Data Leaks 2026
The threat landscape in 2026: indirect prompt injection, data exfiltration patterns, and the defensive layers that actually work.
Tutorial · CodePrompt Caching Production Setup — Claude, OpenAI, Gemini 2026
Cross-provider prompt caching setup that cuts input cost by 90% on stable prompts. Every provider's specific patterns.
MigrationMigrate OpenAI to Claude Without Breaking Users 2026
The shim layer, prompt translation patterns, and rollout strategy for switching production traffic from OpenAI to Claude.
Complete Error Guides by Provider
Every documented error for each major provider, from setup to advanced patterns.