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ARCHIVE PRICERESTRICTED ACCESSdocumented elsewhereTEXT MODELNO CACHE SKU

Claude Mythos Preview API Pricing

Claude Mythos Preview is a restricted cybersecurity preview, not a general API model. $25/M input, $125/M output. Anthropic says it does not plan to make Mythos Preview generally available; the page exists for pricing completeness.

Archived input - per 1M tokens
$25.00/M
Source Anthropic preview
Archived output - per 1M tokens
$125.00/M
Use for invoice checks preview
Cached input
$25.00/M
Cache no separate SKU not listed
Effective - agentic blend
$33.00/M
92/8 split - 82% cache
§ 01 / TERMINAL

Run the numbers.

Archive calculator pre-loaded with Claude Mythos Preview rates. Tweak spend, output mix, or cache hit rate to compare legacy bills with current replacements.

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§ 02 / SCENARIOS

Real-world presets.

CODING AGENT ARCHIVE

Repo-wide bug fix

$2.90/task
81k in - 7k out~34 units/$100
LONG DOC ANALYSIS

Reading 100-page contracts

$5.38/doc
175k in - 8k out~18 units/$100
RAG SUPPORT

Support agent ticket triage

$0.225/ticket
4k in - 1k out~444 units/$100
ASSISTANT TURN

Research planning turn

$0.550/turn
12k in - 2k out~181 units/$100
§ 03 / TAPE

Price history.

Claude Mythos Preview is preview; archived at $25/$125 per M.

Input · $25/M
Output · $125/M
Cached · $25/M
MAY 18 Project Glasswing preview priced at $25/M input and $125/M output after creditsMAY 18 Restricted to Project Glasswing participants and critical-infrastructure organizations
§ 04 / TOKENIZER

Paste text. See tokens. See cost.

Estimate · anthropic-bpe-estimate · ≈3.5 chars/token Auto-counts as you type

This is a chars-per-token approximation, not a real tokenizer. Actual tokens vary by language, code density, and tool-call overhead — counts are typically ±10–20% off for English prose, more for code or non-Latin scripts. For exact billing, use the vendor's official tokenizer.

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§ 05 / SHELF

Up against the shelf.

All models →
Model Input /M Output /M Effective blended Context Best for
Claude Mythos Preview $25.00 cache $25.00 $125 $33.00 current page documented elsewhere Restricted cyber defense research
Claude Sonnet 4.6 $3.00 cache $0.30 $15.00 $1.92 cheaper 1M Legacy Claude production baselines
Claude Haiku 4.5 $1.00 cache $0.10 $5.00 $0.64 cheaper 200K Low-cost Claude archive checks
Claude Opus 4.7 $5.00 cache $0.50 $25.00 $3.21 cheaper 1M Current replacement workloads
GPT-5.4 $2.50 cache $0.25 $15.00 $1.80 cheaper 1.05M Current replacement workloads
Gemini 2.5 Pro $1.25 cache $0.13 $10.00 $1.10 cheaper 2M Gemini long-context work
DeepSeek V4 Pro $0.43 cache $0.00 $0.87 $0.14 cheaper 1M Low-cost reasoning and coding

Frequently asked.

Short answers for teams checking Claude Mythos Preview pricing, status, and migration choices.

Q · 01 Is Claude Mythos Preview still available? +
No. Anthropic says Mythos Preview is restricted to Project Glasswing partners and selected critical-infrastructure organizations.
Q · 02 How much did Claude Mythos Preview cost? +
Claude Mythos Preview is listed here at $25/M input and $125/M output.
Q · 03 Is cached-input pricing included? +
No separate cache discount was listed in the source used for this archive, so the calculator treats cached input as undiscounted.
Q · 04 What should teams use instead? +
For new work, compare against a current model and other current rows in the shelf.
Q · 05 Why keep this archive page? +
Archive pages preserve old price baselines, help explain invoice history, and capture migration search demand without implying the model is the best current choice.
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Reviewed by Yaroslav Vikhariev Founder - AI//COST - Last verified 2026-05-18 - Archive pricing
Methodology Report a correction More by Y.V.