of gpt-oss-120b's structured outputs fail on Google Vertex.
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 | MARA# | 0.76% | 12k | $0.15 / $0.75 | 203 | 97.3% |
| 2 | AkashMLbf16# | 0.90% | 293k | $0.03 / $0.19 | 123 | 100.0% |
| 3 | Nebius Token Factoryfp4# | 1.05% | 57k | $0.15 / $0.60 | 303 | 99.7% |
| 4 | DeepInfrabf16# | 1.08% | 473k | $0.04 / $0.17 | 47 | 98.2% |
| 5 | Crusoebf16# | 1.13% | 377k | $0.05 / $0.25 | 332 | 99.6% |
| 6 | DekaLLMbf16# | 1.17% | 245k | $0.03 / $0.18 | 59 | 99.9% |
| 7 | Mancerfp8# | 1.23% | 78k | $0.05 / $0.25 | 64 | 99.6% |
| 8 | Basetenfp4# | 1.25% | 92k | $0.10 / $0.50 | 184 | 99.5% |
| 9 | Parasailfp4# | 1.41% | 23k | $0.10 / $0.75 | 127 | 100.0% |
| 10 | Cerebrasfp16# | 1.75% | 863k | $0.35 / $0.75 | 573 | 100.0% |
| 11 | Together# | 2.02% | 17k | $0.15 / $0.60 | 98 | 98.4% |
| 12 | Groq# | 2.12% | 831k | $0.15 / $0.60 | 355 | 100.0% |
| 13 | NEAR AIfp4# | 2.12% | 358k | $0.03 / $0.15 | 50 | 99.9% |
| 14 | Phala# | 2.47% | 8.7k | $0.15 / $0.60 | 60 | 98.8% |
| 15 | SiliconFlowfp8# | 5.81% | 6.7k | $0.15 / $0.60 | 42 | 92.4% |
| 16 | CoreWeavefp4# | 6.53% | 145k | $0.03 / $0.17 | 104 | 99.9% |
| 17 | Sail Researchfp4# | 6.95% | 41k | $0.06 / $0.40 | 153 | 100.0% |
| 18 | Google Vertex# | 10.21% | 6.9k | $0.09 / $0.36 | 34 | 2.9% |
Recommended OpenRouter settings for gpt-oss-120b
{
"provider": {
"order": [
"mara",
"akashml/bf16",
"nebius/fp4"
],
"ignore": [
"siliconflow/fp8",
"coreweave/fp4",
"sail-research/fp4",
"google-vertex/global"
]
}
}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 Google Vertex as on MARA, its best provider.
broken structured outputs a day across its 18 providers.
Releasing a model? Make your own API the one every provider is measured against.
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