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GPT Image 2.5 Sunburst vs Muse Spark 1.3

Comparing GPT Image 2.5 Sunburst and Muse Spark 1.3 across benchmarks, pricing, and capabilities.

OpenAI · Meta · Updated for 2026

Which is better?

GPT Image 2.5 Sunburst and Muse Spark 1.3 trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, Muse Spark 1.3 is roughly 5.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose GPT Image 2.5 Sunburst

  • you want the most recent training data — it shipped Sep 2026

Choose Muse Spark 1.3

  • cost matters — it's about 5.6x cheaper per token

FAQ

Common questions about GPT Image 2.5 Sunburst vs Muse Spark 1.3.

Which is better, GPT Image 2.5 Sunburst or Muse Spark 1.3?

GPT Image 2.5 Sunburst (OpenAI) and Muse Spark 1.3 (Meta) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT Image 2.5 Sunburst compare to Muse Spark 1.3 in benchmarks?

Muse Spark 1.3 scores MRCR v2 (8-needle): 98.5%, MRCR v2 (8-needle, 512K-1M): 98.1%, DeepSearchQA: 89.4%, Terminal-Bench 2.1: 88.8%, DeepSWE 1.1: 75.4%.

Is GPT Image 2.5 Sunburst cheaper than Muse Spark 1.3?

Muse Spark 1.3 is 4.0x cheaper for input tokens. GPT Image 2.5 Sunburst costs $5.00/M input and $30.00/M output via openai. Muse Spark 1.3 costs $1.25/M input and $4.25/M output via meta.

What are the context window sizes for GPT Image 2.5 Sunburst and Muse Spark 1.3?

GPT Image 2.5 Sunburst supports an unknown number of tokens and Muse Spark 1.3 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT Image 2.5 Sunburst and Muse Spark 1.3?

Key differences include input pricing ($5.00 vs $1.25/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT Image 2.5 Sunburst and Muse Spark 1.3?

GPT Image 2.5 Sunburst is developed by OpenAI and Muse Spark 1.3 is developed by Meta.

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