Claude Opus 5.5 vs Muse Spark 1.3: API pricing
As of Oct 14, 2026, Claude Opus 5.5 costs $4.00 input / $20.00 output per million tokens from Anthropic, and Muse Spark 1.3 costs $1.25 / $4.25 from Meta. For 10M input and 2M output tokens a month, Claude Opus 5.5 comes to $80.00 and Muse Spark 1.3 to $21.00, so Muse Spark 1.3 is 74% cheaper than Claude Opus 5.5. On LMArena, Claude Opus 5.5 scores higher, 1516 against 1490.
Your monthly cost at the official price
Claude Opus 5.5: $80.00
Muse Spark 1.3: $21.00cheaper
| Detail |  Claude Opus 5.5 |  Muse Spark 1.3 |
|---|---|---|
| Maker | Anthropic | Meta |
| Official input / output | $4.00 / $20.00per million tokens | $1.25 / $4.25per million tokens |
| Cached input | $0.20 | $0.15 |
| Cheapest seller | $4.00 / $20.00Amazon Bedrock Converse | $1.25 / $4.25Meta |
| Sellers | 6 | 2 |
| Context | 1M | 1.05M |
| LMArena overall | 1516 · #2 | 1490 · #12 |
| LMArena coding | 1543 · #2 | 1512 · #13 |
| Features |
Every seller's price: Claude Opus 5.5 · Muse Spark 1.3
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Prices in USD from LiteLLM and models.dev, checked daily; arena scores from LMArena (CC BY 4.0). Confirm on the seller's pricing page before you rely on a number.