flatkey.ai Blog
Insights, product notes, and implementation guides for teams building on AI APIs.
AI Gateway Architecture
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Latest articles in Base URL and SDK Migration.
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Latest articles in Cost, Billing, and Ops.
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Latest articles in Enterprise Controls and Trust.
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Latest articles in Gateway Comparisons.
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Latest articles in Model and Modality Playbooks.
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Free LLM API: Limits, Costs, and Production Tradeoffs
A practical guide to free LLM API tiers, credits, rate limits, hidden operating costs, and the production controls to add before users depend on a route.
H200 GPU Price (October 2026): Rental Per Hour, Card and Server Costs
Current H200 GPU prices by provider (per GPU-hour), H200 NVL card and server listings, monthly cost math, and a buy-vs-rent checklist, checked October 28, 2026.
Kimi K3 vs GPT 5.6 Sol: Pricing, Context, and Which API to Test
A source-checked comparison of Kimi K3, GPT-5.6 Sol, and GPT-5.6 Terra for developers choosing a production API route.
Ollama OpenAI Compatible API: Access, Pricing, Integration, and Production Guide
Use the Ollama OpenAI compatible API locally or in the cloud. Compare endpoints and pricing, configure the OpenAI SDK, and ship with production guardrails.
7 Best OpenAI Alternatives for Developers in 2026
A developer-focused comparison of direct model providers, hosted routers, and AI gateways to evaluate as OpenAI alternatives in 2026.
NVIDIA H100 GPU: Architecture, Performance, and Cloud Deployment Guide
A practical guide to NVIDIA H100 architecture, cloud topology, Kubernetes deployment, performance validation, and completed-work cost.
Best LLMs for Coding in 2026: A Developer's Decision Guide
A task-based guide to selecting coding LLMs with a 20-case evaluation, hard gates, a scorecard, and a safe multi-model comparison workflow.
Anthropic API Key (2026): How to Get One, Key Types, Claude Code Setup, and Fixes
Step-by-step Anthropic API key guide for 2026: Console setup, personal vs service account keys, expiration rules, first request code, Claude Code setup, costs, and error fixes.
Genspark AI Agent Builder API Custom: Access, Pricing, Integration, and Production Guide
A practical guide to Genspark Custom Agent access, pricing, connectors, and the right production architecture when your app needs a documented API.
H200 GPU: Architecture, Performance, and Cloud Deployment Guide
A practical H200 guide for selecting a form factor, sizing memory and fabric, deploying on cloud infrastructure, and validating latency, throughput, health, and completed-work cost.
GPU Server: Architecture, Performance, and Cloud Deployment Guide
Choose and deploy a cloud GPU server with a workload-first architecture, performance-testing, and production-readiness framework.
Open AI API Key: Access, Pricing, Integration, and Production Guide
A practical guide to creating, securing, pricing, integrating, and operating an OpenAI API key in production.
Claude Sonnet API (2026): Model IDs, Setup, Limits, and Code for Sonnet 5.5
Everything to call Claude Sonnet 5.5 through the API: model IDs, keys, working code, effort and thinking settings, rate limits, costs, and migration fixes.
Amazon Bedrock OpenAI-Compatible API: Base URL, Auth, Models, and Code (2026)
How to call Amazon Bedrock with the OpenAI SDK: endpoints, short- and long-term API keys, model IDs, curl/Python/Node code, guardrails, pricing, and fixes.
10 Best AI API Providers in 2026: Pricing, Access, and Limits Compared
A practical comparison of 10 AI API providers, covering access paths, pricing mechanics, rate limits, and the direct-provider versus gateway decision.
AI API Pricing Comparison (October 2026): OpenAI vs Claude vs Gemini vs Qwen vs DeepSeek vs Kimi
One dated table of official AI API prices for OpenAI, Claude, Gemini, Qwen, DeepSeek and Kimi in October 2026, plus discounts, promo end dates, worked monthly budgets, and a cost calculator.
LiteLLM Common Errors: Timeouts, Budget Alerts, and Provider Fails
A practical LiteLLM troubleshooting guide for timeouts, budget controls, alerts, model configuration, provider failures, retries, and fallbacks.
SGLang Prefill Decode Disaggregation: Architecture and Deployment Guide
Deploy SGLang prefill decode disaggregation with separate GPU pools, KV-cache transfer, validation metrics, topology choices, and rollout checks.
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