of Kimi K3's structured outputs fail on Modal (mxfp4).
Updated October 31, 2026 · How we measure
Structured-output index
The same model breaks your pipeline's structured outputs 15× more often on some inference providers than on others. Find the best one for your pipelines.
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| # | Provider | Structured outputs a day | $ in / out per M | Tokens/s | Uptime | |
|---|---|---|---|---|---|---|
| 1 | Parasailfp4# | 0.20% | 25k | $3.00 / $15.00 | 35 | 98.2% |
| 2 | DeepInframxfp4# | 0.52% | 12k | $2.85 / $14.25 | 80 | 99.9% |
| 3 | Fireworks# | 0.59% | 13k | $3.00 / $15.00 | 34 | 88.4% |
| 4 | Alibaba Cloud Int.# | 0.70% | 1.7k | $3.45 / $17.25 | 34 | 99.4% |
| 5 | Together# | 0.73% | 28k | $3.00 / $15.00 | 31 | 98.7% |
| 6 | Makorafp4# | 0.91% | 10k | $0.50 / $13.00 | 55 | 99.7% |
| 7 | Fireworks Spotspot# | 0.94% | 75k | $2.10 / $10.50 | — | 96.4% |
| 8 | Wafermxfp4# | 1.35% | 81k | $0.19 / $9.60 | 76 | 100.0% |
| 9 | Fireworksfast# | 1.59% | 4.9k | $4.50 / $22.50 | 93 | 96.8% |
| 10 | AkashMLfp4# | 1.98% | 1.1k | $1.20 / $14.00 | 48 | 99.0% |
| 11 | inference.netfp4/fast# | 2.04% | 39k | $0.50 / $11.88 | 96 | 100.0% |
| 12 | Chutesmxfp4# | 2.05% | 1.1k | $1.85 / $9.50 | 22 | 95.2% |
| 13 | Morphfp8# | 2.35% | 4.8k | $1.28 / $14.63 | 86 | 99.9% |
| 14 | Moonshot AI# | 2.35% | 4.0k | $3.00 / $15.00 | 31 | 100.0% |
| 15 | inference.netfp4# | 3.11% | 37k | $0.23 / $6.97 | 45 | 100.0% |
| 16 | Phala# | 3.14% | 5.5k | $2.55 / $12.75 | 22 | 99.9% |
| 17 | Wafermxfp4/fast# | 3.21% | 6.0k | $0.15 / $22.00 | 85 | 100.0% |
| 18 | Decartmxfp4# | 3.43% | 3.9k | $1.95 / $9.75 | — | 99.7% |
| 19 | Sail Researchfp4# | 4.00% | 29k | $0.15 / $7.15 | 61 | 100.0% |
| 20 | Modalmxfp4# | 6.71% | 7.3k | $3.00 / $15.00 | 81 | 100.0% |
Also ignored, under 1,000 structured outputs a day: DigitalOcean 4.80%.
Recommended OpenRouter settings for Kimi K3
{
"provider": {
"order": [
"parasail/fp4",
"deepinfra/mxfp4",
"alibaba"
],
"ignore": [
"inference-net/fp4",
"inference-net/us",
"phala",
"wafer/fast",
"decart/mxfp4",
"sail-research/fp4",
"digitalocean",
"modal/mxfp4"
]
}
}Give llms.txt to your agent
Get updates when its successor drops
And which provider to use.
For model makers
Broken structured outputs carry your model's name
Your users don't see the provider. They see your model failing.
as often on Modal (mxfp4) as on Parasail (fp4), its best provider.
broken structured outputs a day across its 16 providers.
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