On the headline score, Anthropic's Claude Haiku 5.5 (Max) and Meta's Muse Spark 1.3 (Max) are almost level. Price separates them more than anything else; on a blended basis Muse Spark 1.3 Max costs 10 times as much as Claude Haiku 5.5 Max. No hands-on testing went into this write-up; it summarises the recorded benchmark, price and speed data for both models.
Running costs
The list prices are $0.10 in and $0.50 out for Claude Haiku 5.5 Max, and $1.25 in and $4.25 out for Muse Spark 1.3 Max, per million tokens. That makes Claude Haiku 5.5 Max's output 88% cheaper.
A reference job of 1 million input tokens and 200,000 output tokens costs $0.20 with Claude Haiku 5.5 Max and $2.10 with Muse Spark 1.3 Max, so Claude Haiku 5.5 Max saves $1.90. Scale it up to writing 2,000 drafts of 2,000 output tokens from 300-token prompts and the bill is $2.06 for Claude Haiku 5.5 Max against $17.75 for Muse Spark 1.3 Max. On a 3:1 blend of input to output tokens, that works out to $0.20 versus $2.00 per million.
Waiting time
Claude Haiku 5.5 Max generates about 233 tokens per second and Muse Spark 1.3 Max about 140 tokens per second. Claude Haiku 5.5 Max is ahead by 66% on throughput. The wait for the first token averages 4.6 minutes on Claude Haiku 5.5 Max against 36 seconds on Muse Spark 1.3 Max. The faster writer, Claude Haiku 5.5 Max, gives away too much at the start to win on time: counting the first-token wait, Muse Spark 1.3 Max finishes first for any reply shorter than about 85,000 tokens. Waits that long are felt on every chat-style request, though they matter less for batch jobs.
Add the two numbers up for a 600-token reply and Muse Spark 1.3 Max finishes first: 4.7 minutes for Claude Haiku 5.5 Max, 40 seconds for Muse Spark 1.3 Max.
When they came out
Claude Haiku 5.5 Max arrived on October 7, 2026, 35 days after Muse Spark 1.3 Max (September 2, 2026). They are effectively contemporaries.
A dead heat on the headline index
Claude Haiku 5.5 Max scores 36.5 on the intelligence index and Muse Spark 1.3 Max scores 36.6. On an aggregate like this, under a point is effectively level.
Among 109 active scored models, Claude Haiku 5.5 Max sits 37th and Muse Spark 1.3 Max 36th.
There are no coding or math index scores for either model in the catalogue, which keeps this comparison at the aggregate level.
Value for money
A blunt value measure, blended price over intelligence score, puts Claude Haiku 5.5 Max at $0.0055 and Muse Spark 1.3 Max at $0.055 per point. With scores this close, Claude Haiku 5.5 Max is simply the cheaper way to buy the same capability.

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