Which is cheaper, Muse Spark 1.2 and GLM-5.3-Flash?

GLM-5.3-Flash has the lowest input price. Per 1M input tokens: Muse Spark 1.2 from $1.25 and GLM-5.3-Flash from $0.07.

Which has the larger context window, Muse Spark 1.2 and GLM-5.3-Flash?

GLM-5.3-Flash has the largest context window: Muse Spark 1.2 1,048,576 tokens and GLM-5.3-Flash 1,310,720 tokens.

Which is better for coding, Muse Spark 1.2 and GLM-5.3-Flash?

Muse Spark 1.2 scores highest on the Artificial Analysis Coding Index: Muse Spark 1.2 72.2 and GLM-5.3-Flash 71.5.

Which is smarter, Muse Spark 1.2 and GLM-5.3-Flash?

GLM-5.3-Flash scores highest on the Artificial Analysis Intelligence Index: Muse Spark 1.2 39.6 and GLM-5.3-Flash 41.8.

Can I switch between Muse Spark 1.2 and GLM-5.3-Flash without changing my code?

Yes. All of them are served through FastRouter's OpenAI-compatible API, so switching is a change of the model parameter (meta/muse-spark-1.2, z-ai/glm-5.3-flash).

Muse Spark 1.2 vs GLM-5.3-Flash

Side-by-side pricing per provider, context window, benchmark scores and speed, all on one OpenAI-compatible API.

Muse Spark 1.2 Metameta/muse-spark-1.2

GLM-5.3-Flash Z.aiz-ai/glm-5.3-flash

Creator

Muse Spark 1.2 vs GLM-5.3-Flash: summary

Muse Spark 1.2 and GLM-5.3-Flash are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.

Muse Spark 1.2, from Meta, has a 1,048,576-token context window, costs $1.25/1M input and $4.25/1M output tokens and scores 39.6 on the Artificial Analysis Intelligence Index.

GLM-5.3-Flash, from Z.ai, has a 1,310,720-token context window, costs from $0.07/1M input and $0.25/1M output tokens across 5 providers and scores 41.8 on the Artificial Analysis Intelligence Index.

GLM-5.3-Flash is the cheapest on input, 18× cheaper than the next model, GLM-5.3-Flash has the largest context window, GLM-5.3-Flash scores highest for intelligence and Muse Spark 1.2 leads on coding.

Switch with one line

client = OpenAI(base_url="https://api.fastrouter.ai/api/v1", api_key="<FASTROUTER_API_KEY>") client.chat.completions.create(model="meta/muse-spark-1.2", messages=[...]) # or client.chat.completions.create(model="z-ai/glm-5.3-flash", messages=[...])

Full API docs

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Benchmark scores sourced from ArtificialAnalysis