CostMon — Anthropic Price ChangesEvery Anthropic price change CostMon tracks that actually moved a bill, cuts and increases both, with the source and what to do about it.https://costmon.comClaude Opus 4.5 cut Opus-tier pricing to $5/$25 per million tokens.https://costmon.com/price-changes#claude-opus-4-5-pricing-cuthttps://costmon.com/price-changes#claude-opus-4-5-pricing-cutOpus 4.5 launched at $5 input / $25 output per million tokens, a cut Anthropic frames as putting frontier-tier capability within reach of more teams. ($5 / $25 per M tokens) — Re-evaluate workloads kept on Sonnet purely for cost. At the new rate, Opus may be affordable for tasks where the extra capability wasn't worth the old premium.Mon, 24 Nov 2025 00:00:00 GMTAnthropicCutClaude Haiku 4.5 launched at a third of Sonnet 4's price for comparable coding performance.https://costmon.com/price-changes#claude-haiku-4-5-pricinghttps://costmon.com/price-changes#claude-haiku-4-5-pricingThe new small model launched at a flat $1 input / $5 output per million tokens, positioned by Anthropic as Sonnet-4-level coding at a third of the cost. ($1 / $5 per M tokens) — Benchmark current Sonnet-4-class workloads against Haiku 4.5 and shift eligible traffic down a tier, checking quality on your own tasks first.Wed, 15 Oct 2025 00:00:00 GMTAnthropicRestructureAnthropic cut tool-use output tokens on Claude 3.7 Sonnet by up to 70%.https://costmon.com/price-changes#anthropic-token-saving-updates-2025https://costmon.com/price-changes#anthropic-token-saving-updates-2025A new token-efficient tool-use mode cut output tokens consumed on tool-calling workloads, and prompt-cache reads stopped counting against input-token-per-minute rate limits. (up to −70% output tokens) — Turn on token-efficient tool use for tool-calling workloads, and check whether old throttling logic built around the rate limit is still needed.Thu, 13 Mar 2025 00:00:00 GMTAnthropicCutAnthropic launched a batch endpoint priced at half the standard API rate.https://costmon.com/price-changes#anthropic-message-batches-api-50-offhttps://costmon.com/price-changes#anthropic-message-batches-api-50-offThe Message Batches API processes up to 10,000 queries asynchronously within 24 hours, at half the price of a standard synchronous call. (−50% vs standard API) — Audit API traffic for anything without a real-time latency requirement and move it to the Batches API to cut that portion of the bill in half.Tue, 08 Oct 2024 00:00:00 GMTAnthropicRestructure