Rewrite BitRouter vs OpenRouter, fix stale platform-fee claims

[SPIKESPIGEL404]

Rewrites /docs/overview/bitrouter-vs-openrouter as a short, conversational page, and fixes a pricing claim that was contradicting itself across the repo.

The page

The old version argued on agent-native primitives (KYA, x402, MCP gateway, injection checks) and a ~5ms vs ~30ms latency gap. Neither holds up as a differentiator — OpenRouter is also low-latency and agent-native — so both are gone. The page now argues the three things that actually differ:

1. Fully open source and self-hostable — Apache 2.0, runs in your VPC; OpenRouter is closed-source cloud only.
2. We take no cut — 0% markup, BYOK free.
3. The router learns your workload — the act → observe → evaluate → learn loop, versus a static auto-router.

And three honest reasons to pick OpenRouter instead: catalog breadth, free-tier models, and enterprise depth.

The intro opens by crediting OpenRouter for building the category before pivoting to what we're betting on — the enumeration it replaced was scaffolding the bolded lead-ins already provided.

The pricing fix

The repo said two different things about what BitRouter charges:

• 0% markup — pricing page, models page, lib/llms-shared.ts, enterprise and startup pages
• 2% stablecoin / 5% card — three CompareTable rows and the migration guide

0% is correct. Fixed all four stale spots (the OpenRouter, LiteLLM, and Portkey comparison rows, plus migrate-from-openrouter.mdx). Left alone, the vs-OpenRouter page would have claimed 0% in prose with a table two inches below saying 2%.

The prose also concedes that OpenRouter passes inference through at 0% too, then names the fees that genuinely differ — 5.5% to load credits, 5% on BYOK past their free allowance. Conceding the shared ground is what makes the rest credible to a reader who already knows their pricing.

The table

Cut from 10 rows to 5, one per argument. Ten rows ran longer than the prose it supported, restated the "when OpenRouter wins" section, and turned the page into a scorecard against a catalog we deliberately don't try to match.

Verified

• pnpm lint:docs passes (49 docs)
• Page renders correctly in dev; no new console errors
• tsc shows only pre-existing errors in components/ai/search.tsx and components/markdown.tsx

Before merging

• Verify OpenRouter's current fees. 5.5% on credits and 5% on BYOK are now stated as fact in three files, and their pricing moves.
• "We've learned plenty from them" in the intro is a claim about the team, not a checkable fact — confirm it's one we want to make publicly.

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