GLM-5.3-Flash vs Muse Spark 1.3
GLM-5.3-Flash wins on Overall; Muse Spark 1.3 wins on Coding, Multimodal. Every numeric field is compared below, with a worked monthly-cost example and a pick rule for each use case.
Verdict at a glance
Choose GLM-5.3-Flash if you…
- Among the cheapest
- Fast
- Open source
- Best for: Ultra-fast, Ultra-low-cost, High concurrency
Choose Muse Spark 1.3 if you…
- #1 DeepSWE long-horizon coding
- Open weights, self-hostable
- Extremely low cost
- Fast
- Best for: Coding, Open-source deployment, Budget
Head-to-head aggregate scores
Scores are 0–100, aggregated from public benchmark information and independently weighted across three leaderboards. Rank is out of 26 tracked models.
Aggregated from public sources and independently weighted; methodology on the Terms page. Scores within 3 points are treated as statistically tied.
Specs & pricing — every field side by side
List API prices in USD per 1M tokens. The highlighted cell is the stronger value/capability on that row.
| Dimension | GLM-5.3-Flash | Muse Spark 1.3 | Verdict |
|---|---|---|---|
| Vendor | Zhipu AI (CN) | Meta (US) | Different vendors |
| Released | 2026.08 | 2026.09 | Muse Spark 1.3 is newer |
| Overall (rank) | 65 · #21 | 64 · #22 | GLM-5.3-Flash +1 |
| Coding | 60 · #24 | 88 · #5 | Muse Spark 1.3 +28 |
| Multimodal | 63 · #25 | 76 · #17 | Muse Spark 1.3 +13 |
| Context window | 128K | 256K | Muse Spark 1.3 larger |
| Max output | 64K | 64K | Tie |
| Effective-context | 80 | 85 | Muse Spark 1.3 more reliable |
| Input $/1M | $0.07 | $1.25 | GLM-5.3-Flash cheaper |
| Output $/1M | $0.25 | $4.25 | GLM-5.3-Flash cheaper |
| Cache discount | none | none | Tie |
| Speed | ~90 tok/s | ~70 tok/s | GLM-5.3-Flash faster |
| TTFT | 0.2s | 0.4s | GLM-5.3-Flash snappier |
| Function calling | 70 | 72 | Muse Spark 1.3 ahead |
| Refusal rate | ~6% | ~4% | Muse Spark 1.3 less restrictive |
| English | 65 | 84 | Muse Spark 1.3 |
| Chinese | 85 | 62 | GLM-5.3-Flash |
| Modalities | text | text, image | different coverage |
| Open weights | Yes | Yes | Both open |
| Fine-tuning | Yes | Yes | |
| Free tier | ChatGLM free | Open weights free to self-host; hosted API at $1.25/$4.25 per 1M | |
| SOC2 / no-train | no / yes | no / yes | |
| Private deployment | Yes | Yes | Both support it |
Fields drawn from vendor public documentation and the Modelspectra 26-model dataset; speed varies with network, concurrency and prompt length. Verify current pricing before purchase.
Dimension-by-dimension analysis
Reasoning & overall intelligence
GLM-5.3-Flash leads the overall aggregate by 1 points (65 vs 64). That is a meaningful, not marginal, edge on hard, multi-step reasoning, while Muse Spark 1.3 remains a strong generalist that is not out of its depth on routine work.
Agentic coding
This is a decisive gap: Muse Spark 1.3 scores 88 against 60. On multi-file edits, SWE-style tickets and long-horizon agent loops Muse Spark 1.3 needs fewer correction turns; GLM-5.3-Flash is still competent for scripts and assisted completion but trails as task complexity rises.
Multimodal
Muse Spark 1.3 leads multimodal 76 vs 63. A concrete modality difference: Muse Spark 1.3 additionally handles image. Neither emits native video, so the comparison is about parsing images and documents, not generation.
Speed & latency
GLM-5.3-Flash is faster in interactive use: ~90 tok/s with 0.2s TTFT versus ~70 tok/s with 0.4s TTFT (about 1.3× the throughput). For conversational UIs where perceived responsiveness drives retention, that edge is a real product factor even when raw reasoning is lower.
Context: window vs usable recall
Nominal windows are 128K for GLM-5.3-Flash and 256K for Muse Spark 1.3. Effective-context scores point the same way as window size — Muse Spark 1.3 is ahead on usable recall (85 vs 80), so prefer it for long-document work where details cannot be missed.
Price & total cost
GLM-5.3-Flash is the cheaper API at $0.07/$0.25 versus Muse Spark 1.3 at $1.25/$4.25 per 1M input/output tokens — list input is about 16.7× lower.
Chinese vs English
English: GLM-5.3-Flash 65 vs Muse Spark 1.3 84. Chinese: 85 vs 62. For Chinese-language production, GLM-5.3-Flash is the stronger pick. Note that non-Chinese models generally require overseas network access for their APIs.
Tool use & ecosystem
Function-calling score: GLM-5.3-Flash 70 vs Muse Spark 1.3 72, so Muse Spark 1.3 has the edge on structured tool use. Fine-tuning is available from GLM-5.3-Flash and Muse Spark 1.3. Factor in existing SDK/plugin familiarity — switching cost often outweighs a few-point tool-use gap.
Cost worked example — same workload, real token math
Assume a production workload of 100M input + 30M output tokens per month, with 90% of input tokens served from cache. Figures use public list prices.
| Scenario · per month | GLM-5.3-Flash | Muse Spark 1.3 | Gap |
|---|---|---|---|
| List priceno cache applied | $15100M in × $0.07 + 30M out × $0.25 | $252100M in × $1.25 + 30M out × $4.25 | 16.80×gap |
| With caching90% of inputs cache-hit | $15no published cache discount | $252no published cache discount | 16.80×gap |
Illustrative model; your input/output mix and cache-hit ratio change the result. Prices are list rates before any enterprise agreement.