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Muse Spark 1.1 vs GPT 5.1 Codex Max

At a glance
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
OpenAIGPT 5.1 Codex Max

Extended-context coding model for large codebase operations.

400K ctx$1.25/$10.00 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
MetaMuse Spark 1.1
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-16
Cheaper
Reasoning & Knowledge
Expert-Level52.2%
Agentic
Terminal Tasks80.0%Task Horizon—
OpenAIGPT 5.1 Codex Max
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Reasoning & Knowledge
Expert-Level—
Agentic
Terminal Tasks60.4%Task Horizon2.7h
Specs
MetaMuse Spark 1.1
1.0M
Context
16K
Max output
Jul 2026
Released
OpenAIGPT 5.1 Codex Max
400K
Context
128K
Max output
Dec 2025
Released
Capabilities
MetaMuse Spark 1.1
Vision
Audio
Reasoning
OpenAIGPT 5.1 Codex Max
Vision
Audio
Reasoning
Pricing
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
OpenAIGPT 5.1 Codex Max
Live pricing, shown before you run
Input$1.25/M tokens
Output$10.00/M tokens
Cache read$0.13/M tokens
Web search$0.01/search
Chat with Muse Spark 1.1Go to model
Chat with GPT 5.1 Codex MaxGo to model
Frequently Asked Questions: Muse Spark 1.1 vs GPT 5.1 Codex Max▼

Which is better, Muse Spark 1.1 or GPT 5.1 Codex Max?

▼

Both Muse Spark 1.1 and GPT 5.1 Codex Max 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, Muse Spark 1.1 or GPT 5.1 Codex Max?

▼

Muse Spark 1.1 has a lower blended cost. Muse Spark 1.1: $1.25 input / $4.25 output. GPT 5.1 Codex Max: $1.25 input / $10.00 output.

Which has a larger context window, Muse Spark 1.1 or GPT 5.1 Codex Max?

▼

Muse Spark 1.1 has a larger context window: Muse Spark 1.1 supports 1M tokens vs GPT 5.1 Codex Max at 400K tokens.

Do both Muse Spark 1.1 and GPT 5.1 Codex Max support vision?

▼

Yes, both Muse Spark 1.1 and GPT 5.1 Codex Max support vision/image input.

What are the key differences between Muse Spark 1.1 and GPT 5.1 Codex Max?

▼

Muse Spark 1.1 and GPT 5.1 Codex Max have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.

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 Muse Spark 1.1 and GPT 5.1 Codex Max for free on idapt.app to see which performs better for your specific needs.

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