What Muse Spark 1.3 is
Muse Spark 1.3 is a Meta model that went live on OpenRouter on September 2, 2026. It follows Muse Spark 1.2. Per standard answer it costs about the same, $0.0034 against $0.0034, and it keeps the same 1M token context window.
| Released | September 2, 2026 |
| Provider | Meta |
| Context window | 1M tokens |
| Input, per million tokens | $1.25 |
| Output, per million tokens | $4.25 |
| Credits per message in Whizi | 5 |
| Minimum Whizi plan | Powerhouse |
How to try Muse Spark 1.3 in Whizi
Whizi puts Muse Spark 1.3 in the same model picker as ChatGPT, Claude and Gemini, so there is no separate Meta account or API key to set up. Pick a plan on the pricing page, open a new chat, choose Muse Spark 1.3 in the model picker and send your first message.
Each message costs 5 credits, whatever its length. If a question turns out to suit another model better, switch in the same conversation and the thread carries across. See switching models mid-conversation.
What Muse Spark 1.3 costs
List rates are what the provider charges per token. The cost of one standard answer is the more useful number, because it prices the same unit of work across every model regardless of how each one is billed.
| Input, per million tokens | $1.25 |
| Output, per million tokens | $4.25 |
| One standard answer | $0.0034 |
| One thousand answers | $3.38 |
| Context window | 1M tokens |
| Credits per message in Whizi | 5 |
| Minimum Whizi plan | Powerhouse |
| Rank by cost, of 113 priced models | 79 |
Prices are the published Meta rates as carried by OpenRouter, last refreshed 2026-09-26. The full dataset covering all 124 models from 33 providers is the AI model cost index, which is free to reuse with attribution.
What it costs inside Whizi
Whizi meters messages in credits rather than tokens, and Muse Spark 1.3 is charged at 5 credits per message. The cost does not change with the length of your message or the length of the answer, so a one line question and a long document analysis cost the same.
| Plan | Price per month | Monthly credits | Messages on this model |
|---|---|---|---|
| Powerhouse | $49.99, or $34.99 billed yearly | 8,000 | 1,600 |
Muse Spark 1.3 is part of the Powerhouse catalogue. Anything not explicitly listed on the Starter or Pro tiers resolves to Powerhouse, which is the deliberate default for the frontier and specialist models. See plans and limits.
- Input $1.25 and output $4.25 per million tokens
- $0.0034 for one standard answer, $3.38 for a thousand
- 1M token context window
- 5 credits per message inside Whizi
- Requires the Powerhouse plan or above
- Ranks 79 of 113 priced models by cost per answer
Frequently asked questions
What is Muse Spark 1.3?
Muse Spark 1.3 is a Meta model released on September 2, 2026, with a 1M token context window. It follows Muse Spark 1.2. Per standard answer it costs about the same, $0.0034 against $0.0034, and it keeps the same 1M token context window.
How do I use Muse Spark 1.3?
Sign up for Whizi, open a new chat and choose Muse Spark 1.3 in the model picker. It is available on the Powerhouse plan and above at 5 credits per message, with no Meta account or API key needed.
How much does Muse Spark 1.3 cost?
$1.25 per million input tokens and $4.25 per million output tokens at list rates, which works out to $0.0034 for one standard answer of 1,000 tokens in and 500 out, or $3.38 for a thousand of them. Inside Whizi it is 5 credits per message on a monthly allowance, rather than metered per token.
Which Whizi plan includes Muse Spark 1.3?
Powerhouse and above, which is $49.99 per month or $34.99 billed yearly. At 5 credits per message, a Powerhouse allowance of 8,000 credits covers 1,600 messages on this model if you spend the whole allowance here, and most people mix in a 1 credit model for routine work so it goes further.