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GPT OSS 20B vs Muse Spark 1.1

At a glance
OpenAIGPT OSS 20B

OpenAI's compact open-weights model for efficient inference.

131K ctx$0.03/$0.14 per M
MetaMuse Spark 1.1

Meta's multimodal reasoning model built for agentic work and real-world coding.

1.0M ctx$1.25/$4.25 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
OpenAIGPT OSS 20B
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Reasoning & Knowledge
Expert-Level—
Agentic
Terminal Tasks3.4%
MetaMuse Spark 1.1
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-16
Reasoning & Knowledge
Expert-Level52.2%
Agentic
Terminal Tasks80.0%
Specs
OpenAIGPT OSS 20B
131K
Context
16K
Max output
Aug 2025
Released
MetaMuse Spark 1.1
1.0M
Context
16K
Max output
Jul 2026
Released
Capabilities
OpenAIGPT OSS 20B
Vision
Audio
Reasoning
MetaMuse Spark 1.1
Vision
Audio
Reasoning
Pricing
OpenAIGPT OSS 20B
Live pricing, shown before you run
Input$0.03/M tokens
Output$0.14/M tokens
MetaMuse Spark 1.1
Live pricing, shown before you run
Input$1.25/M tokens
Output$4.25/M tokens
Cache read$0.15/M tokens
Web search$0.003/search
Chat with GPT OSS 20BGo to model
Chat with Muse Spark 1.1Go to model
Frequently Asked Questions: GPT OSS 20B vs Muse Spark 1.1▼

Which is better, GPT OSS 20B or Muse Spark 1.1?

▼

Both GPT OSS 20B and Muse Spark 1.1 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, GPT OSS 20B or Muse Spark 1.1?

▼

GPT OSS 20B has a lower blended cost. GPT OSS 20B: $0.03 input / $0.14 output. Muse Spark 1.1: $1.25 input / $4.25 output.

Which has a larger context window, GPT OSS 20B or Muse Spark 1.1?

▼

Muse Spark 1.1 has a larger context window: GPT OSS 20B supports 131K tokens vs Muse Spark 1.1 at 1M tokens.

Do both GPT OSS 20B and Muse Spark 1.1 support vision?

▼

Muse Spark 1.1 supports vision/image input, but GPT OSS 20B does not.

What are the key differences between GPT OSS 20B and Muse Spark 1.1?

▼

Key differences: GPT OSS 20B is significantly cheaper; only Muse Spark 1.1 supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GPT OSS 20B and Muse Spark 1.1 for free on idapt.app to see which performs better for your specific needs.

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