01
THE PROBLEM
Every month, a new
"best"
model.
GPT-5.5
Claude Fable 5
DeepSeek V4
Gemini 3.1 Pro
Opus 4.8
Generic leaderboard rank
#1 · #2 · #3 …
How it performs on
your
task
?
The only way to know is to test it — on your work
02
DESCRIBE IT
openmark.ai — editor · simple mode
DESCRIBE THE TASK
✨ Generate
TASK PREVIEW
task:
ticket-urgency-classifier
tests:
-
prompt:
"Classify: 'Site is down…'"
expected:
"high"
-
prompt:
"Classify: 'Typo in the docs…'"
# +3 more
scoring:
exact_match
scoring auto-selected · 18 deterministic modes
03
YOUR RULES
openmark.ai — editor · advanced & manual
✓
Test 1
— prompt + expected answer
📎 invoice_03.pdf
✓
Test 2
— prompt + expected answer
📎 photo_112.jpg
+
Add test — files, images & documents as inputs
MANUAL · YAML
- prompt:
"{{your production prompt}}"
expected:
"{{known good output}}"
scoring:
contains_all
attach files & images
edit every detail by hand
test your production prompts
04
PICK MODELS & RUN
openmark.ai — benchmark · 100+ models
LIVE RUN
gpt-5.4
claude-opus-4.6
gemini-3.1-flash-lite
claude-fable-5
deepseek-v4
mistral-large
grok-4
command-a
gpt-5.1
claude-haiku-4.5
gemini-3-flash
qwen3-235b
Stability runs
2
Max tokens
200
Find optimal temp
ON
Fail fast
ON
RUNNING — REAL API CALLS, IN PARALLEL
gpt-5.4
claude-opus-4.6
gemini-3.1-flash-lite
05
THE RESULTS
openmark.ai — results · your task
1
gpt-5.4
69%
$0.00208
2
claude-opus-4.6
66%
$0.0257
3
gemini-3.1-flash-lite
63%
$0.000168
4
mistral-large
61%
$0.000754
5
claude-opus-4.7
61%
$0.0170
accuracy · stability · speed · real cost per run
gpt-5.4 · test 7/20
✓ 1.0/1.0
EXPECTED
high
MODEL RESPONSE — RUN 1/2
high
in 585 tok
out 41 tok
2.6s
06
SHARE IT
Your task — benchmark results
gpt-5.4
claude-opus-4.6
gemini-3.1-flash
openmark.ai
— shareable results image
CSV
JSON
TXT
07
START FREE
OpenMark
STOP GUESSING. KNOW.
NO API KEYS
NO CODE
FREE TO START
Benchmark your task
openmark.ai
0:00
Find the best AI model for YOUR task.
OpenMark, explained in 90 seconds.
100+ MODELS
REAL API CALLS
SCORED RESULTS