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Claude Haiku 4.5 vs GPT-5.6 Terra

Side-by-side API economics and benchmarks. Per-1M input and output rates, context window, and verified metrics.

Tale of the tape

Head-to-head specs pulled from each model profile.

Metric Claude Haiku 4.5 GPT-5.6 Terra
Input cost / 1M $1.00 $2.50
Output cost / 1M $5.00 $15.00
Context window 200,000 tokens 1,050,000 tokens
MMLU score

Cost verdict

Enter monthly input and output volumes to see total cost savings.

Claude Haiku 4.5

Input: 1M × $1.00 = $1.00
Output: 1M × $5.00 = $5.00
Total
$6.00

GPT-5.6 Terra

Input: 1M × $2.50 = $2.50
Output: 1M × $15.00 = $15.00
Total
$17.50

Total cost savings

$11.50

Claude Haiku 4.5 saves $11.50 per month vs the other model at this volume.

Model routing savings

Uses this page's verified rates. GPT-5.6 Terra is the premium route (higher combined per-1M cost); Claude Haiku 4.5 handles routine traffic.

Premium model

GPT-5.6 Terra

$2.50 in · $15.00 out / 1M

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Economical model

Claude Haiku 4.5

$1.00 in · $5.00 out / 1M

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All premium

GPT-5.6 Terra

$875.00

100% of input and output on the premium route

Routed stack

80%Claude Haiku 4.5

GPT-5.6 Terra

$415.00

Routine slice
$240.00
Premium slice
$175.00

Monthly savings

$460.00

52.6% lower

Rates pulled from this page's model database entries (gpt-5-6-terra, claude-haiku-4-5) — same per-1M input/output figures as Tale of the tape. Production routing needs quality gates and monitoring.

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