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Add OpenRouter support to lib_llm #135

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Merged
patham9 merged 3 commits into from
Feb 28, 2026
Merged

Add OpenRouter support to lib_llm #135

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0df42e1
Add OpenRouter support
leungmanhin Feb 27, 2026
d23419f
Inject a OpenRouter helper into builtins
leungmanhin Feb 27, 2026
8c2d140
Add useOpenRouterEmbedding as well
leungmanhin Feb 27, 2026
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16 changes: 16 additions & 0 deletions lib/lib_llm.metta
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,11 @@
;Add to builtins a function that can access by index:
!(py-eval "setattr(__import__('builtins'),'index', (lambda o,i: o[i])) or 0")

;Add to builtins a function that POST JSON to OpenRouter and return the assistant reply text
!(py-eval "setattr(__import__('builtins'),'or_post',(lambda model,prompt,key: __import__('json').loads(__import__('urllib.request',fromlist=['urlopen','Request']).urlopen(__import__('urllib.request',fromlist=['Request']).Request('https://openrouter.ai/api/v1/chat/completions',__import__('json').dumps({'model':model,'messages':[{'role':'user','content':prompt}]}).encode('utf-8'),{'Authorization':'Bearer '+key,'Content-Type':'application/json'})).read())['choices'][0]['message']['content'])) or 0")
;Add to builtins a function that POST to OpenRouter embeddings endpoint and return the embedding vector
!(py-eval "setattr(__import__('builtins'),'or_embed',(lambda model,text,key: __import__('json').loads(__import__('urllib.request',fromlist=['urlopen','Request']).urlopen(__import__('urllib.request',fromlist=['Request']).Request('https://openrouter.ai/api/v1/embeddings',__import__('json').dumps({'model':model,'input':text}).encode('utf-8'),{'Authorization':'Bearer '+key,'Content-Type':'application/json'})).read())['data'][0]['embedding'])) or 0")

;Function to prompt GPT via OpenAI API:
(= (useGPT $prompt)
(let* (($client (py-call (openai.OpenAI)))
Expand All @@ -33,6 +38,12 @@
($_ (cut)))
$text))

;Function to prompt a model via OpenRouter API:
(= (useOpenRouter $model $prompt)
(let* (($apikey (once (py-eval "__import__('os').environ.get('OPENROUTER_API_KEY','')")))
($text (once (py-call (builtins.or_post $model $prompt $apikey)))))
$text))

(= (sread-safe $w)
(case (catch (sread $w))
(((Error $A $B) (empty))
Expand All @@ -50,3 +61,8 @@
($vector (py-call (getattr $item "embedding")))
($_ (cut)))
$vector))

(= (useOpenRouterEmbedding $model $text)
(let* (($apikey (once (py-eval "__import__('os').environ.get('OPENROUTER_API_KEY','')")))
($vector (once (py-call (builtins.or_embed $model $text $apikey)))))
$vector))