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GPT 5 Codex vs Muse Spark 1.1

At a glance
OpenAIGPT 5 Codex

GPT-5 optimized for code generation and software engineering tasks.

400K ctx$1.25/$10.00 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 5 Codex
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Reasoning & Knowledge
Expert-Level—
Agentic
Terminal Tasks44.3%
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%
Specs
OpenAIGPT 5 Codex
400K
Context
128K
Max output
Sep 2025
Released
MetaMuse Spark 1.1
1.0M
Context
16K
Max output
Jul 2026
Released
Capabilities
OpenAIGPT 5 Codex
Vision
Audio
Reasoning
MetaMuse Spark 1.1
Vision
Audio
Reasoning
Pricing
OpenAIGPT 5 Codex
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
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 5 CodexGo to model
Chat with Muse Spark 1.1Go to model
Frequently Asked Questions: GPT 5 Codex vs Muse Spark 1.1▼

Which is better, GPT 5 Codex or Muse Spark 1.1?

▼

Both GPT 5 Codex 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 5 Codex or Muse Spark 1.1?

▼

Muse Spark 1.1 has a lower blended cost. GPT 5 Codex: $1.25 input / $10.00 output. Muse Spark 1.1: $1.25 input / $4.25 output.

Which has a larger context window, GPT 5 Codex or Muse Spark 1.1?

▼

Muse Spark 1.1 has a larger context window: GPT 5 Codex supports 400K tokens vs Muse Spark 1.1 at 1M tokens.

Do both GPT 5 Codex and Muse Spark 1.1 support vision?

▼

Yes, both GPT 5 Codex and Muse Spark 1.1 support vision/image input.

What are the key differences between GPT 5 Codex and Muse Spark 1.1?

▼

GPT 5 Codex and Muse Spark 1.1 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 GPT 5 Codex and Muse Spark 1.1 for free on idapt.app to see which performs better for your specific needs.

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