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OmniRoute's calculateCost() always estimated request cost from token counts x static pricing, discarding xAI's exact provider-reported cost when present. xAI's chat-completions usage object reports the precise billed cost via cost_in_usd_ticks (docs.x.ai/developers/cost-tracking and the API reference's usage schema: "TICKS_IN_USD_CENT: i64 = 100_000_000" => 1e10 ticks/USD, e.g. 37756000 ticks ~= $0.0038). calculateCost()/computeCostFromPricing() now short-circuit to this exact figure when present -- before any pricing DB lookup, so it also works for models without a local pricing row -- and still fall back to the token-based estimate when it is absent. The field is threaded through both the streaming (extractUsage/normalizeUsage) and non-streaming (extractUsageFromResponse) usage-extraction paths. Corrected divisor vs upstream: the upstream PR used /1e12 (a 100x under-report, e.g. reporting $0.00123 as the doc's $0.123 example); this port uses the doc-verified /1e10 instead, confirmed against both the cost-tracking guide and the API reference's usage-object schema. Inspired-by: https://github.com/decolua/9router/pull/2453 Co-authored-by: ryanngit <74137224+ryanngit@users.noreply.github.com>