Social Media Captions
Platform-specific content for every post
Take a product photo, campaign brief, or article URL and generate platform-optimized captions for Instagram, LinkedIn, Twitter/X, and TikTok — each calibrated to the right tone, length, hashtag density, and call-to-action for the channel.
GPT-6 Luna
for 200K tokens a month · 35% input / 65% output
Why this model
For this workload — 200K tokens a month, 35% of them input — it comes to about $0.07 a month, the lowest of the models suggested here.
Alternative models
Implementation tips
- 1
Define platform constraints explicitly in your prompt: character limits, hashtag counts, CTA format, and emoji usage — the model respects hard constraints better than vague style guidance.
- 2
Use a two-step pipeline: first extract 3–5 'content angles' from the source material, then generate captions for each angle — this gives marketers options to A/B test rather than one output.
- 3
Batch generate 30 days of captions in a single API call using structured JSON output — far more efficient than one-at-a-time and enables bulk scheduling tool integration.