LLM gateways and observability · November 2026 Edition
OpenRouter vs Langfuse
One of fourteen models named OpenRouter first on the direct prompt; zero named Langfuse. OpenRouter was named by fourteen of the fourteen models and Langfuse by thirteen and OpenRouter carries 41 labels and Langfuse 16, so the shares are not directly comparable.
Named in one category this edition.
Named in four categories this edition.
First-choice share2%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate20%0%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#6#7A position in a field of 9; printed, not drawn.
Labels4116A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, OpenRouter reading right to left. Rank and label count are printed, not drawn.Portkey was named alongside these two in fourteen of the fourteen direct answers. LiteLLM vs OpenRouter · LiteLLM vs Langfuse · Portkey vs OpenRouter
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the LLM gateways and observability page.
By framing
How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
OpenRouterFirst choices, of fourteen modelsLangfuse
Direct101 against OpenRouter
Paraphrase01
Comparative002 against OpenRouter
Budget-constrained001 against OpenRouter
Scale-constrained00
Negative004 against OpenRouter
Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where OpenRouter and Langfuse stood in it.
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | | | |||
| GPT-5.4 mini | | | | | ||
| Gemini 3.5 Flash | | | ||||
| Perplexity Sonar | | | | | | |
| Grok 4.20 | | | ||||
| Mistral Small | | |||||
| DeepSeek V4 Flash | | | | | ||
| Llama 4 Maverick | | | ||||
| Qwen 3.7 Flash | | | | | | |
| Kimi K2 | | |||||
| GLM 4.7 FlashX | | | | | ||
| MiniMax M2.5 | | | | |||
| GPT-6 Luna | | | | | ||
| Muse Glimmer 30B | | | | |
OpenRouter Langfuse first choice named as an alternative argued againstblank: not namedEach cell is one answer, OpenRouter on the left and Langfuse on the right.The direct prompt
The plain question, one answer per model, grouped by where OpenRouter and Langfuse stood in it.
OpenRouter first, Langfuse not the choice
1 of 14 modelsLangfuse was named in the answer but not as the choice, or not at all.GPT-5.4 miniOpenRouter alternatives: Kong AI Gateway, LiteLLM, Portkey
Neither was the first choice, one was named
6 of 14 modelsThe answer put something else first and named one of the two as an alternative.Claude Haiku 4.5Nexos.ai, Portkey alternatives: Bifrost, LiteLLM, OpenRouter
Perplexity SonarPortkey alternatives: Bifrost, LiteLLM, OpenRouter
Mistral SmallLiteLLM, Portkey alternatives: OpenRouter, Requesty
Llama 4 MaverickFastRouter alternatives: Concentrate, LiteLLM, OpenRouter, Portkey
Qwen 3.7 FlashLiteLLM, Portkey alternatives: Bifrost, Cloudflare AI Gateway, Kong AI Gateway, OpenRouter
MiniMax M2.5LiteLLM alternatives: Cloudflare AI Gateway, Helicone, OpenRouter, Portkey
Neither was named
7 of 14 modelsThe answer made no first choice from these two in this category.Gemini 3.5 FlashLiteLLM, Portkey alternatives: Bifrost, Cloudflare AI Gateway
Grok 4.20Portkey alternatives: Cloudflare AI Gateway, LiteLLM
DeepSeek V4 FlashBifrost, Portkey alternatives: Amazon Bedrock, Azure API Management, LiteLLM
Kimi K2Portkey alternatives: FastRouter, Kong AI Gateway, LiteLLM, TrueFoundry AI Gateway
GLM 4.7 FlashXLiteLLM alternatives: Bifrost, Kong AI Gateway, Portkey
GPT-6 LunaPortkey alternatives: Cloudflare AI Gateway, LiteLLM
Muse Glimmer 30BLiteLLM, Portkey alternatives: Kong AI Gateway, TrueFoundry AI Gateway
Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
OpenRouter leads by three points.
OpenRouter7%#4 of 9Langfuse3%#6 of 9Mid-marketThe figures above
Level: the same share of first choices.
OpenRouter2%#6 of 9Langfuse2%#7 of 9Enterprise
The order flips: Langfuse leads at enterprise.
Langfuse4%#5 of 10OpenRouter0%#10 of 10What the models said about OpenRouter
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“The one I would not recommend for a mid-market B2B company is OpenRouter” DeepSeek V4 Flash · direct prompt · hard negative
“"avoid OpenRouter for anything with sensitive/PII data" [4]” Muse Glimmer 30B · negative prompt · hard negative
“Exercise caution with OpenRouter, Portkey, Vercel AI Gateway, and similar services when prompts contain personal, regulated, proprietary, or agent data.” Perplexity Sonar · negative prompt · soft negative
“Best default for most mid-market teams: OpenRouter” GPT-5.4 mini · direct prompt · first choice
“Well‑documented, transparent marketplaces that expose provider lists, pricing, and model performance data (e.g., OpenRouter, Portkey AI Gateway)” GLM 4.7 FlashX · negative prompt · alternative
“Choose Cloudflare or OpenRouter if you want zero infrastructure maintenance and fast deployment out of the box.” Gemini 3.5 Flash · comparative prompt · alternative
What the models said about Langfuse
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Two of two in this category shown.
“Top Recommendation: Langfuse + Bifrost” GLM 4.7 FlashX · paraphrase prompt · first choice
“Langfuse (top if you prioritize open-source/self-hosting): Excellent framework-agnostic tracing” Grok 4.20 · paraphrase prompt · alternative
Also compared
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.