Latest articles
Explore practical routing guides, API performance notes, and product updates from the Fastrouter team.
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What engineers building with LLMs are actually struggling with, from single-provider risk to token leaderboards to prompt caching nobody configured.
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GPT-5.6 Luna, Terra, and Sol are now available on FastRouter. Three tiers, one endpoint, from high volume workhorse to flagship reasoning.
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Grok 4.5 is now available on FastRouter. xAI's Opus-class model for coding and agentic workflows, priced for large, tool-heavy sessions.
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Prompt Hub lets teams write, version, and optimise prompts outside the codebase.
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Ask the FastRouter Playground to build an app or game and it renders the result instantly — interactive, no code required.
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FastRouter Playground lets you run one prompt across multiple models and see the outputs side by side.
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Amazon shut down a token leaderboard. Uber burned through its AI budget in a quarter. This is not an AI hype problem — it is what happens when usage scales without governance
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AI Spend Management: What Engineering Leaders Need to Get Right in 2026
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Stop deploying code just to update a prompt. FastRouter Prompt Library gives you versioning, instant rollback, and GEPA optimization.
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Sticky routing pins each conversation to one provider endpoint so your prompt cache stays warm. Here is how FastRouter handles it automatically.
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Prompt caching can cut repeated context costs by up to 90%. Here is how it works across major providers and why most teams are not using it yet
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We fine-tuned Gemma 3 4B on 3,000 synthetic browser trajectories and benchmarked it against GPT-5.1, Claude 4.5 Sonnet, and six other models.
