ClaudevsGPT

Claude Haiku 4.5 vs GPT 5.6 Luna

Side-by-side comparison of pricing, task quality, and projected cost at higher scale.

Pricing

Side-by-side pricing

Claude Haiku 4.5

Fast / Budget

GPT 5.6 Luna

Fast / Budget
Input $/MTok
$1.00
$1.00
Output $/MTok
$5.00
$6.00
Cache discount
90% off
90% off
Context
200K
1,000K

Quality

Task confidence comparison

Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
72
vs
70
Code Review
70
vs
68
Summarization
82
vs
84
Q&A
86
vs
85
Extraction
88
vs
89
Reasoning
65
vs
63
Classification
90
vs
91
Creative Writing
60
vs
58
Claude Haiku 4.5
GPT 5.6 Luna

Guidance

When to use Claude Haiku 4.5 vs GPT 5.6 Luna

Choose Claude Haiku 4.5 when...

  • -You need strong q&a (confidence 86 vs 85)
  • -You need strong code generation (confidence 72 vs 70)
  • -You need strong code review (confidence 70 vs 68)
  • -You need strong reasoning (confidence 65 vs 63)

Choose GPT 5.6 Luna when...

  • -You need strong classification (confidence 91 vs 90)
  • -You need strong extraction (confidence 89 vs 88)
  • -You need strong summarization (confidence 84 vs 82)
  • -You need a larger context window (1,000K vs 200K)

At scale

Cost at scale

Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Haiku 4.5
GPT 5.6 Luna
100K tokens
$0.22Cheaper
$0.25
1M tokens
$2.20Cheaper
$2.50
10M tokens
$22.00Cheaper
$25.00

FAQ

When should I use Claude Haiku 4.5 instead of GPT 5.6 Luna?

Claude Haiku 4.5 outperforms GPT 5.6 Luna for Q&A, Code Generation, Code Review. It costs $1.00/$5.00 per million tokens (input/output).

Is GPT 5.6 Luna cheaper than Claude Haiku 4.5?

Both models have the same input pricing at $1.00/MTok. Compare output pricing: $5.00 vs $6.00/MTok.

What are the context window sizes for Claude Haiku 4.5 and GPT 5.6 Luna?

Claude Haiku 4.5 has a 200K token context window. GPT 5.6 Luna has a 1,000K token context window.

Track your real costs

Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.