Grok 4.3
$1.25/M input
$2.5/M output
$0.2/M cached input
xAI general chat model seed.
Model comparison
Grok 4.3 vs Claude Fable 5 Cost Calculator
Claude Fable 5
$10/M input
$50/M output
$1/M cached input
Top-tier Claude pricing seed.
Quick estimate
No API key needed. Pick a model, paste your question, choose the answer length, and get a close cost estimate.
$1.25/M input$2.5/M output1,000,000 ctxCache pricingBatchPriorityTool fees
3. How long will the AI answer be?
Your estimate will appear here.
Paste a prompt, choose an answer length, and calculate.
Example request costs
Short prompt
Grok 4.3: $0.002500
Claude Fable 5: $0.0350
Long coding prompt
Grok 4.3: $0.0437
Claude Fable 5: $0.5000
App build planning prompt
Grok 4.3: $0.0175
Claude Fable 5: $0.2000
Which is cheaper, Grok 4.3 or Claude Fable 5?
Grok 4.3 has the lower combined input plus output seed rate for this comparison.
Why might my bill differ from this comparison?
Cache usage, tools, search, long-context tiers, region multipliers, and provider-reported token counts can change the final bill.