Google: Gemini 4 Carbon (batch) vs Meta: Muse Spark Open

For a sample job of 1 million input tokens and 250,000 output tokens, Gemini 4 Carbon (batch) costs $2.25 and Muse Spark Open costs $2.31, so Gemini 4 Carbon (batch) is slightly cheaper for the same work.

Both read up to 1,048,576 tokens at once, roughly 1,573 pages of text.

On our blended benchmark score Gemini 4 Carbon (batch) leads 98.9 to 37.1.

Across the 20 tasks where they differ, Gemini 4 Carbon (batch) scores higher on 18 (SQL Generation, Code Review, Code Completion and others), Muse Spark Open on 2 (JSON Extraction, Bulk Data Labeling).

Gemini 4 Carbon (batch) was released in November 2026 and Muse Spark Open in October 2026.

Pick Gemini 4 Carbon (batch) if you need lower cost, benchmark performance or the stronger all-round task scores.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.