Provider pricing hub
Anthropic API pricing at the catalog rate.
As of 9 September 2026, RouterPlex lists 8 Anthropic chat routes — Fable, Opus, Sonnet and Haiku. Token prices are vendor list rates with 0% markup. The calculator uses those live numbers, not a scraped marketing table. Sonnet 5's intro rate ended 31 August 2026; the catalog row is the bill.
8
Routes
$1.00
Cheapest input / 1M
Anthropic pricing calculator
Same workload. Every Claude route.
Defaults are a 10K-in / 1K-out request, 3,000 times a month. Switch to the 100K / 10K agent turn if you are costing a coding loop.
Workload calculator
Catalog rates · USD · no markup
Models in the estimate
4 selected| Route | Per request | Monthly | $100 buys |
|---|---|---|---|
| Claude Haiku 4.5 Anthropic | $0.015 | $45.00 | 6,666 req |
| Claude Sonnet 5 Anthropic | $0.030 | $90.00 | 3,333 req |
| Claude Sonnet 4.6 Anthropic | $0.045 | $135.00 | 2,222 req |
| Claude Opus 4.6 Anthropic | $0.075 | $225.00 | 1,333 req |
Estimates apply live catalog input and output rates only. Actual spend follows the tokens your client sends and the model returns. Image-generation routes are omitted because they are not a chat turn.
Anthropic family
Published catalog rates.
Agent-turn cost uses 100K input and 10K output so a cheap input rate cannot hide expensive output.
| Model route | Context | Input / 1M | Output / 1M | Agent turn |
|---|---|---|---|---|
Claude Haiku 4.5 claude-haiku-4-5 | 256K | $1.00 | $5.00 | $0.15 |
Claude Sonnet 5 claude-sonnet-5 | 1M | $2.00 | $10.00 | $0.30 |
Claude Sonnet 4.6 claude-sonnet-4-6 | 1M | $3.00 | $15.00 | $0.45 |
Claude Opus 4.6 claude-opus-4-6 | 1M | $5.00 | $25.00 | $0.75 |
Claude Opus 4.7 claude-opus-4-7 | 1M | $5.00 | $25.00 | $0.75 |
Claude Opus 4.8 claude-opus-4-8 | 1M | $5.00 | $25.00 | $0.75 |
Claude Opus 5 claude-opus-5 | 1M | $5.00 | $25.00 | $0.75 |
Claude Fable 5 claude-fable-5 | 1M | $10.00 | $50.00 | $1.50 |
How to pick
Price is the easy part. The family is not.
These notes only use catalog fields: price, context, and mode. They are not quality rankings.
Cheapest chat route
Claude Haiku 4.5 is the low-cost Anthropic default in this catalog. Use it when the task is short and you will retry rather than spend Opus or Fable rates on a first draft.
Fable is not a cheaper Opus
Claude Fable 5 lists at $10.00 / $50.00 while Claude Opus 5 is $5.00 / $25.00. Pick Fable when you mean the higher-rate flagship, not because the name sounds adjacent to Opus.
One key, two SDK shapes
Claude Code and the Anthropic SDK use https://api.routerplex.com. Cursor, Cline, and the OpenAI SDK use https://api.routerplex.com/v1. Same key, same catalog IDs, same per-key budget.
Compare the rest of the catalog on all model pricing, the OpenAI hub, or the cheapest-first ledger. Quality evidence lives on benchmarks.
Before you bill production
Anthropic pricing, in questions.
01How much does the Anthropic API cost on RouterPlex?+
As of 9 September 2026, RouterPlex bills Anthropic chat models at the live catalog rate with 0% markup. Claude Haiku 4.5 is the cheapest chat route at $1.00 per 1M input tokens and $5.00 per 1M output tokens. The same rates appear on each model page and in the calculator above.
02What is the cheapest Anthropic model here?+
Claude Haiku 4.5 is the cheapest Anthropic chat route in this catalog: $1.00 / $5.00 per 1M tokens, about $0.15 for a 100K-in / 10K-out agent turn.
03Does RouterPlex mark up Claude token prices?+
No. Anthropic chat routes are billed at the vendor list price shown in the catalog. There is no per-token markup and no fee when you top up. You pay for the tokens the model actually uses, from a prepaid balance that stops at $0.
04Can I use these models with the Anthropic SDK or Claude Code?+
Yes. Point the Anthropic SDK or Claude Code at https://api.routerplex.com (the SDK appends /v1/messages), use your RouterPlex key as ANTHROPIC_AUTH_TOKEN, and set the model string to the catalog id (for example "claude-sonnet-5" or "claude-haiku-4-5").
05Can I use Claude with the OpenAI SDK?+
Yes. Point any OpenAI SDK or tool at https://api.routerplex.com/v1, use your RouterPlex key, and set the model string to the catalog id. The request shape stays Chat Completions. Cursor, Cline, and Aider use this path.
06Why might a number here differ from anthropic.com/pricing?+
This page shows the rate RouterPlex bills today, pulled from the live catalog on 9 September 2026. Official marketing pages can change, hydrate in JavaScript, or list a promotional cut we have not been charged yet — Claude Sonnet 5's intro rate ended 31 August 2026. If the two disagree, the catalog rate is what a request on this key costs.
07How does Claude Fable 5 compare to Opus 5 on price?+
Claude Fable 5 is $10.00 / $50.00 per 1M against Claude Opus 5 at $5.00 / $25.00. Fable is the higher-rate Anthropic flagship on this catalog, not a cheaper Opus.
08Which Anthropic model has the largest context window?+
Claude Sonnet 5 publishes the largest context in this Anthropic set (1M). Context is a catalog field, not a quality score.
09Is there an Anthropic image-generation route?+
No. This Anthropic set is chat models only. Image-generation routes from other providers are listed on the models index and excluded from cheapest-model rankings.
Route Claude from one balance
One key reaches every Claude route here.
Top up from $5. No subscription. No token markup.