Claude Mythos 5.1 vs Muse Spark 1.2

Pricing verdict: Claude Mythos 5.1 vs Muse Spark 1.2: Muse Spark 1.2 is cheaper for input-heavy usage ($1.25/M vs $10.00/M input tokens), while Claude Mythos 5.1 is better for long-context tasks (1,000,000 tokens).

Direct answer: choose Muse Spark 1.2 for lower token spend and choose Claude Mythos 5.1 when your workload needs longer context.

Compare API pricing, input and output token costs, context windows, and monthly estimates on one page so you can pick the right model fast.

Anthropic

Claude Mythos 5.1

Meta (via Together AI)

Muse Spark 1.2

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Claude Mythos 5.1 pricing page Muse Spark 1.2 pricing page Anthropic provider overview Meta (via Together AI) provider overview

Cost Comparison (1000 input + 500 output tokens, 100 requests/day)

Claude Mythos 5.1

Per Request:$0.035

Daily:$3.50

Monthly:$105.00

Yearly:$1,277.50

Muse Spark 1.2

Per Request:$0.003375

Daily:$0.3375

Monthly:$10.125

Yearly:$123.1875

Cost Differences

$0.031625

Per Request

$3.1625

Daily

$94.875

Monthly

$1,154.3125

Yearly

Muse Spark 1.2 costs less than Claude Mythos 5.1

Quick Recommendation

Winner for direct API pricing: Muse Spark 1.2. At the default workload, Muse Spark 1.2 saves about $94.875/month ($1,154.3125/year) versus Claude Mythos 5.1.

Claude Mythos 5.1 full pricing breakdown Muse Spark 1.2 full pricing breakdown Anthropic API pricing details Meta (via Together AI) API pricing details Anthropic vs Meta (via Together AI) API pricing GPT-6 Astra vs Claude Fable 5.1 GPT-6 Astra vs Claude Mythos 5.1

Feature Comparison

Feature	Claude Mythos 5.1	Muse Spark 1.2
Provider	Anthropic	Meta (via Together AI)
Input Price	$10.00/1M tokens	$1.25/1M tokens
Output Price	$50.00/1M tokens	$4.25/1M tokens
Context Window	1,000,000 tokens	1,000,000 tokens
Max Output	128,000 tokens	131,072 tokens
Category	flagship	coding
Capabilities	textvisionreasoningcode	textvisionaudiovideocodereasoning
Release Date	9/1/2026	8/5/2026

Claude Mythos 5.1 vs Muse Spark 1.2: Which Should You Choose?

Choosing between Claude Mythos 5.1 and Muse Spark 1.2 depends on your priorities: cost efficiency, context length, or raw capability. Muse Spark 1.2 is the more affordable option at $1.25/1M input tokens — 88% cheaper than Claude Mythos 5.1.

These models come from different providers — Anthropic and Meta (via Together AI) — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Anthropic, switching to Meta (via Together AI)involves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.

These models target different tiers: Claude Mythos 5.1 is a flagship model while Muse Spark 1.2 is coding. This means they're optimized for different workloads. Claude Mythos 5.1 is built for complex tasks that require deeper reasoning, while Muse Spark 1.2 offers better value for routine operations.

Output costs matter too. Claude Mythos 5.1 charges $50.00/1M output tokens vs $4.25 for Muse Spark 1.2. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Muse Spark 1.2 has the edge here at $4.25/1M output tokens.

Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.

Best Use Cases

Choose Claude Mythos 5.1 when:

• You're already using Anthropic's API ecosystem

Choose Muse Spark 1.2 when:

• Budget is a primary concern
• You need more capabilities (audio, video)
• You need longer outputs (up to 131,072 tokens)
• You're already using Meta (via Together AI)'s API ecosystem

Pros and Caveats at a Glance

Claude Mythos 5.1

• Input pricing: $10.00/M tokens
• Output pricing: $50.00/M tokens
• Context window: 1,000,000 tokens
• Max output: 128,000 tokens

Watch out for

• Higher input cost than Muse Spark 1.2
• Higher output cost than Muse Spark 1.2

Muse Spark 1.2

• Input pricing: $1.25/M tokens
• Output pricing: $4.25/M tokens
• Context window: 1,000,000 tokens
• Max output: 131,072 tokens

Watch out for

• Trade-offs are minor in this matchup.

Try Different Scenarios

Use the calculator below to see how costs change with different usage patterns

Claude Mythos 5.1 (Anthropic)

Cost Calculator

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Muse Spark 1.2 (Meta (via Together AI))

Cost Calculator

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Frequently Asked Questions

Which is cheaper, Claude Mythos 5.1 or Muse Spark 1.2?▼

Muse Spark 1.2 is cheaper for input tokens at $1.25 per million tokens vs $10.00 for Claude Mythos 5.1 — that's 88% savings on input costs.

What is the context window difference between Claude Mythos 5.1 and Muse Spark 1.2?▼

Claude Mythos 5.1 supports 1,000,000 tokens while Muse Spark 1.2 supports 1,000,000 tokens — a difference of 0 tokens in favor of Claude Mythos 5.1.

Which model is better for AI Agent / Agentic Workflows?▼

Both models support text, code, reasoning. For ai agent / agentic workflows, Muse Spark 1.2 is the lower-cost option, while Claude Mythos 5.1 offers a larger context window (1,000,000 vs 1,000,000 tokens). Choose Muse Spark 1.2 for budget sensitivity or Claude Mythos 5.1 for longer context tasks.

Which model has better overall pricing for heavy usage?▼

At 100 requests/day with 1,000 input and 500 output tokens each, Claude Mythos 5.1 costs about $105.00/month and Muse Spark 1.2 costs about $10.125/month. Overall, Muse Spark 1.2 has lower combined input + output rates ($1.25 in, $4.25 out) vs Claude Mythos 5.1.

Where can I compare Anthropic and Meta (via Together AI) API pricing beyond this model matchup?▼

See the Anthropic vs Meta (via Together AI) provider comparison page for lineup-level averages, then review each model page for exact per-token rates.