AI Model Watch
Deprecations / Migrate

Migrate off Claude Mythos Preview

Deprecated

Claude Mythos Preview is deprecated and shuts down on 30 Jun 2026. Anthropic's official replacement is Claude Mythos 5. The cheapest comparable model we track is Llama 4 Scout (17B-16E Instruct) (Meta) at $0.15 per 1M tokens blended.

Last verified: 13 Aug 2026 · sourced from official provider documentation

StatusDeprecatedAnthropic
Shutdown date30 Jun 2026plan ahead
Official replacementClaude Mythos 5$20 /M blendedCheapest alternativeLlama 4 Scout (17B-16E Instruct)$0.15 /M blended
What changes

Claude Mythos Preview → Claude Mythos 5

SpecClaude Mythos PreviewClaude Mythos 5
StatusDeprecatedPreview
Blended price /1M—$20
Input / output /1M—$10 / $50
Context window1M1M
Max output—128.000
Modalitytext, image, visiontext, image, vision
Knowledge cutoff——

API string was claude-mythos-preview → switch to claude-mythos-5. See Claude Mythos 5's full spec sheet →

Cheapest alternatives

Budget-friendly replacements for Claude Mythos Preview

Generally-available models that match Claude Mythos Preview's capabilities (and at least half its 1M context), ranked by blended price. Every number is computed from official catalog prices.

ModelBlended /1MInput / outputContext
Llama 4 Scout (17B-16E Instruct)
Meta
$0.15$0.1 / $0.310M
Qwen3.5-Flash
Alibaba
$0.175$0.1 / $0.41M
Llama 4 Maverick (17B-128E Instruct)
Meta
$0.262$0.15 / $0.61M
FAQ

Migrating off Claude Mythos Preview

What replaces Claude Mythos Preview?

Anthropic's recommended migration for Claude Mythos Preview is Claude Mythos 5. The cheapest comparable model in our catalog is Llama 4 Scout (17B-16E Instruct) (Meta) at $0.15/1M blended.

When is Claude Mythos Preview shut down?

Claude Mythos Preview is deprecated and scheduled to shut down on 30 Jun 2026. Migrate before that date to avoid a 404.

What is the cheapest alternative to Claude Mythos Preview?

Llama 4 Scout (17B-16E Instruct) (Meta) is the cheapest generally-available alternative we track that matches Claude Mythos Preview's capabilities, at $0.1 per 1M input and $0.3 per 1M output tokens ($0.15/1M blended).

Browse the full deprecation watch → or see Claude Mythos Preview's full spec sheet →