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Claude Opus 4.8 vs GPT-5.6 Sol

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 Opus 4.8 GPT-5.6 Sol
Input cost / 1M $5.00 $5.00
Output cost / 1M $25.00 $30.00
Context window 1,000,000 tokens 1,050,000 tokens
MMLU score

Cost verdict

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

Claude Opus 4.8

Input: 1M × $5.00 = $5.00
Output: 1M × $25.00 = $25.00
Total
$30.00

GPT-5.6 Sol

Input: 1M × $5.00 = $5.00
Output: 1M × $30.00 = $30.00
Total
$35.00

Total cost savings

$5.00

Claude Opus 4.8 saves $5.00 per month vs the other model at this volume.

Model routing savings

Uses this page's verified rates. GPT-5.6 Sol is the premium route (higher combined per-1M cost); Claude Opus 4.8 handles routine traffic.

Premium model

GPT-5.6 Sol

$5.00 in · $30.00 out / 1M

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Economical model

Claude Opus 4.8

$5.00 in · $25.00 out / 1M

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All premium

GPT-5.6 Sol

$1,750.00

100% of input and output on the premium route

Routed stack

80%Claude Opus 4.8

GPT-5.6 Sol

$1,550.00

Routine slice
$1,200.00
Premium slice
$350.00

Monthly savings

$200.00

11.4% lower

Rates pulled from this page's model database entries (gpt-5-6-sol, claude-opus-4-8) — same per-1M input/output figures as Tale of the tape. Production routing needs quality gates and monitoring.

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