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gptel-anthropic.el
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gptel-anthropic.el
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;;; gptel-anthropic.el --- Anthropic AI suppport for gptel -*- lexical-binding: t; -*-
;; Copyright (C) 2023 Karthik Chikmagalur
;; Author: Karthik Chikmagalur <karthikchikmagalur@gmail.com>
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; This file adds support for Anthropic's Messages API to gptel
;;; Code:
(require 'cl-generic)
(eval-when-compile
(require 'cl-lib))
(require 'map)
(require 'gptel)
(defvar json-object-type)
(declare-function prop-match-value "text-property-search")
(declare-function text-property-search-backward "text-property-search")
(declare-function json-read "json" ())
(declare-function gptel-context--wrap "gptel-context")
(declare-function gptel-context--collect-media "gptel-context")
;;; Anthropic (Messages API)
(cl-defstruct (gptel-anthropic (:constructor gptel--make-anthropic)
(:copier nil)
(:include gptel-backend)))
(cl-defmethod gptel-curl--parse-stream ((_backend gptel-anthropic) _info)
(let* ((content-strs)
(pt (point)))
(condition-case nil
(while (re-search-forward "^event: " nil t)
(setq pt (match-beginning 0))
(if (equal (line-end-position) (point-max))
(error "Data block incomplete"))
(when (looking-at "content_block_\\(?:start\\|delta\\|stop\\)")
(forward-line 1) (forward-char 5)
(when-let* ((response (gptel--json-read))
(content (map-nested-elt
response '(:delta :text))))
(push content content-strs))))
(error (goto-char pt)))
(apply #'concat (nreverse content-strs))))
(cl-defmethod gptel--parse-response ((_backend gptel-anthropic) response _info)
(map-nested-elt response '(:content 0 :text)))
(cl-defmethod gptel--request-data ((_backend gptel-anthropic) prompts)
"JSON encode PROMPTS for sending to ChatGPT."
(let ((prompts-plist
`(:model ,(gptel--model-name gptel-model)
:system ,gptel--system-message
:stream ,(or (and gptel-stream gptel-use-curl
(gptel-backend-stream gptel-backend))
:json-false)
:max_tokens ,(or gptel-max-tokens 1024)
:messages [,@prompts])))
(when gptel-temperature
(plist-put prompts-plist :temperature gptel-temperature))
prompts-plist))
(cl-defmethod gptel--parse-buffer ((_backend gptel-anthropic) &optional max-entries)
(let ((prompts) (prop)
(include-media (and gptel-track-media (or (gptel--model-capable-p 'media)
(gptel--model-capable-p 'url)))))
(if (or gptel-mode gptel-track-response)
(while (and
(or (not max-entries) (>= max-entries 0))
(setq prop (text-property-search-backward
'gptel 'response
(when (get-char-property (max (point-min) (1- (point)))
'gptel)
t))))
(if (prop-match-value prop) ; assistant role
(push (list :role "assistant"
:content
(buffer-substring-no-properties (prop-match-beginning prop)
(prop-match-end prop)))
prompts)
;; HACK Until we can find a more robust solution for editing
;; responses, ignore user prompts containing only whitespace, as the
;; Anthropic API can't handle it. See #409, #406, #351 and #321
(unless (save-excursion (skip-syntax-forward " ")
(eq (get-char-property (point) 'gptel) 'response))
(if include-media ; user role: possibly with media
(push (list :role "user"
:content
(gptel--anthropic-parse-multipart
(gptel--parse-media-links
major-mode (prop-match-beginning prop) (prop-match-end prop))))
prompts)
(push (list :role "user"
:content
(gptel--trim-prefixes
(buffer-substring-no-properties (prop-match-beginning prop)
(prop-match-end prop))))
prompts))))
(and max-entries (cl-decf max-entries)))
(push (list :role "user"
:content
(string-trim (buffer-substring-no-properties (point-min) (point-max))))
prompts))
prompts))
(defun gptel--anthropic-parse-multipart (parts)
"Convert a multipart prompt PARTS to the Anthropic API format.
The input is an alist of the form
((:text \"some text\")
(:media \"/path/to/media.png\" :mime \"image/png\")
(:text \"More text\")).
The output is a vector of entries in a backend-appropriate
format."
(cl-loop
for part in parts
for n upfrom 1
with last = (length parts)
with type
for text = (plist-get part :text)
for mime = (plist-get part :mime)
for media = (plist-get part :media)
if text do
(and (or (= n 1) (= n last)) (setq text (gptel--trim-prefixes text))) and
unless (string-empty-p text)
collect `(:type "text" :text ,text) into parts-array end
else if media
do
(setq type (cond ;Currently supported: Images and PDFs
((equal (substring mime 0 5) "image") "image")
;; NOTE: Only Claude 3.5 Sonnet supports PDF documents:
((equal mime "application/pdf") "document")
(t (error (concat "(gptel-anthropic) Request aborted: "
"trying to send unsupported MIME type %s")
mime))))
and collect
`(:type ,type
:source (:type "base64"
:media_type ,(plist-get part :mime)
:data ,(gptel--base64-encode media))
;; TODO Make media caching a user option
,@(and (gptel--model-capable-p 'cache)
'(:cache_control (:type "ephemeral"))))
into parts-array
finally return (vconcat parts-array)))
(cl-defmethod gptel--wrap-user-prompt ((_backend gptel-anthropic) prompts
&optional inject-media)
"Wrap the last user prompt in PROMPTS with the context string.
If INJECT-MEDIA is non-nil wrap it with base64-encoded media
files in the context."
(if inject-media
;; Wrap the first user prompt with included media files/contexts
(when-let ((media-list (gptel-context--collect-media)))
(cl-callf (lambda (current)
(vconcat
(gptel--anthropic-parse-multipart media-list)
(cl-typecase current
(string `((:type "text" :text ,current)))
(vector current)
(t current))))
(plist-get (car prompts) :content)))
;; Wrap the last user prompt with included text contexts
(cl-callf (lambda (current)
(cl-etypecase current
(string (gptel-context--wrap current))
(vector (if-let ((wrapped (gptel-context--wrap nil)))
(vconcat `((:type "text" :text ,wrapped))
current)
current))))
(plist-get (car (last prompts)) :content))))
;; (if-let ((context-string (gptel-context--string gptel-context--alist)))
;; (cl-callf (lambda (previous)
;; (cl-typecase previous
;; (string (concat context-string previous))
;; (vector (vconcat `((:type "text" :text ,previous))
;; previous))
;; (t context-string)))
;; (plist-get (car (last prompts)) :content)))
(defconst gptel--anthropic-models
'((claude-3-5-sonnet-20241022
:description "Highest level of intelligence and capability"
:capabilities (media tool cache)
:mime-types ("image/jpeg" "image/png" "image/gif" "image/webp" "application/pdf")
:context-window 200
:input-cost 3
:output-cost 15
:cutoff-date "2024-04")
(claude-3-5-sonnet-20240620
:description "Highest level of intelligence and capability"
:capabilities (media tool cache)
:mime-types ("image/jpeg" "image/png" "image/gif" "image/webp")
:context-window 200
:input-cost 3
:output-cost 15
:cutoff-date "2024-04")
(claude-3-opus-20240229
:description "Top-level performance, intelligence, fluency, and understanding"
:capabilities (media tool cache)
:mime-types ("image/jpeg" "image/png" "image/gif" "image/webp")
:context-window 200
:input-cost 15
:output-cost 75
:cutoff-date "2023-08")
(claude-3-5-haiku-20241022
:description "Intelligence at blazing speeds"
:capabilities (media tool)
:mime-types ("image/jpeg" "image/png" "image/gif" "image/webp")
:context-window 200
:input-cost 1.00
:output-cost 5.00
:cutoff-date "2024-07")
(claude-3-haiku-20240307
:description "Fast and most compact model for near-instant responsiveness"
:capabilities (media tool)
:mime-types ("image/jpeg" "image/png" "image/gif" "image/webp")
:context-window 200
:input-cost 0.25
:output-cost 1.25
:cutoff-date "2023-08")
(claude-3-sonnet-20240229
:description "Balance of intelligence and speed (legacy model)"
:capabilities (media tool)
:mime-types ("image/jpeg" "image/png" "image/gif" "image/webp")
:context-window 200
:input-cost 3
:output-cost 15
:cutoff-date "2023-08"))
"List of available Anthropic models and associated properties.
Keys:
- `:description': a brief description of the model.
- `:capabilities': a list of capabilities supported by the model.
- `:mime-types': a list of supported MIME types for media files.
- `:context-window': the context window size, in thousands of tokens.
- `:input-cost': the input cost, in US dollars per million tokens.
- `:output-cost': the output cost, in US dollars per million tokens.
- `:cutoff-date': the knowledge cutoff date.
Information about the Anthropic models was obtained from the following
sources:
- <https://www.anthropic.com/pricing#anthropic-api>
- <https://www.anthropic.com/news/claude-3-5-sonnet>
- <https://assets.anthropic.com/m/61e7d27f8c8f5919/original/Claude-3-Model-Card.pdf>")
;;;###autoload
(cl-defun gptel-make-anthropic
(name &key curl-args stream key
(header
(lambda () (when-let (key (gptel--get-api-key))
`(("x-api-key" . ,key)
("anthropic-version" . "2023-06-01")
("anthropic-beta" . "pdfs-2024-09-25")
("anthropic-beta" . "prompt-caching-2024-07-31")))))
(models gptel--anthropic-models)
(host "api.anthropic.com")
(protocol "https")
(endpoint "/v1/messages"))
"Register an Anthropic API-compatible backend for gptel with NAME.
Keyword arguments:
CURL-ARGS (optional) is a list of additional Curl arguments.
HOST (optional) is the API host, \"api.anthropic.com\" by default.
MODELS is a list of available model names, as symbols.
Additionally, you can specify supported LLM capabilities like
vision or tool-use by appending a plist to the model with more
information, in the form
(model-name . plist)
For a list of currently recognized plist keys, see
`gptel--anthropic-models'. An example of a model specification
including both kinds of specs:
:models
\\='(claude-3-haiku-20240307 ;Simple specs
claude-3-opus-20240229
(claude-3-5-sonnet-20240620 ;Full spec
:description \"Balance of intelligence and speed\"
:capabilities (media tool json)
:mime-types
(\"image/jpeg\" \"image/png\" \"image/gif\" \"image/webp\")))
STREAM is a boolean to toggle streaming responses, defaults to
false.
PROTOCOL (optional) specifies the protocol, https by default.
ENDPOINT (optional) is the API endpoint for completions, defaults to
\"/v1/messages\".
HEADER (optional) is for additional headers to send with each
request. It should be an alist or a function that retuns an
alist, like:
((\"Content-Type\" . \"application/json\"))
KEY is a variable whose value is the API key, or function that
returns the key."
(declare (indent 1))
(let ((backend (gptel--make-anthropic
:curl-args curl-args
:name name
:host host
:header header
:key key
:models (gptel--process-models models)
:protocol protocol
:endpoint endpoint
:stream stream
:url (if protocol
(concat protocol "://" host endpoint)
(concat host endpoint)))))
(prog1 backend
(setf (alist-get name gptel--known-backends
nil nil #'equal)
backend))))
(provide 'gptel-anthropic)
;;; gptel-anthropic.el ends here