CLAUDE TOKEN COUNTER

Claude Token Counter

Estimate tokens and API cost for Anthropic Claude models, including Claude Opus, Sonnet, and Haiku. Anthropic does not publish its tokenizer, so counts here are clearly labeled estimates calibrated for planning prompts and budgets, with current official pricing per model.

PROMPT

Count Claude tokens live.

Tokens

0

Words

0

Characters

0

Input cost

$0.00

Output cost

$0.00

Total request

$0.00

1,000,000 token context windowEstimated count0%

Need optimization signals, a heatmap, monthly projections, or cross-provider comparison? Open the full analyzer.Need billing-exact numbers? Get them free with your own API key.

How Claude tokenization works

Anthropic uses a proprietary tokenizer that is not publicly available, so no third-party tool can give exact offline Claude counts. Tools claiming exact Claude counts without an API call are estimating too.

Claude tokenization is broadly similar to other modern BPE tokenizers: roughly 4 characters per English token, with heavier tokenization for code and non-English text.

For exact counts, the Anthropic API offers a free count_tokens endpoint; this page is for instant, no-API-key planning.

Claude context windows in this catalog range from 200,000 tokens on Sonnet 4.5 and Haiku 4.5 up to 1 million tokens on the Claude 5 family, Opus 4.8, and Sonnet 4.6.

Claude models and current pricing

Claude Fable 5 Token Counter

1,000,000 token context. $10.00 in / $50.00 out per 1M tokens.

Claude Opus 5 Token Counter

1,000,000 token context. $5.00 in / $25.00 out per 1M tokens.

Claude Sonnet 5 Token Counter

1,000,000 token context. $2.00 in / $10.00 out per 1M tokens.

Claude Opus 4.8 Token Counter

1,000,000 token context. $5.00 in / $25.00 out per 1M tokens.

Claude Sonnet 4.6 Token Counter

1,000,000 token context. $3.00 in / $15.00 out per 1M tokens.

Claude Sonnet 4.5 Token Counter

200,000 token context. $3.00 in / $15.00 out per 1M tokens.

Claude Haiku 4.5 Token Counter

200,000 token context. $1.00 in / $5.00 out per 1M tokens.

Pricing refreshed 2026-08-11 from official provider sources. Compare against other providers on the LLM pricing table or browse the full model directory.

FAQ

Claude token counter FAQ

Is this Claude token counter exact?

No tool can count Claude tokens exactly offline, because Anthropic has not released its tokenizer. This counter gives a calibrated estimate that is typically close for English prose, and it is honest about being an estimate. For billing-exact numbers, use the count_tokens endpoint of the Anthropic API.

How many tokens fit in the Claude context window?

Current Claude 5 family models (Fable 5, Opus 5, Sonnet 5) plus Opus 4.8 and Sonnet 4.6 support 1,000,000 tokens of context, while Sonnet 4.5 and Haiku 4.5 support 200,000 tokens — shared between the prompt, conversation history, and the response.

How much does Claude cost per token?

Anthropic bills per million input and output tokens, and rates differ by model tier: Fable is the frontier tier, Opus the premium tier, Sonnet the balanced tier, and Haiku the fast and economical tier. The counter above shows current rates for the model you select, sourced from the official Anthropic pricing page.