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Claude Opus 4.8 vs GPT-4.1

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-4.1
Input cost / 1M $5.00 $2.00
Output cost / 1M $25.00 $8.00
Context window 1,000,000 tokens 1,047,576 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-4.1

Input: 1M × $2.00 = $2.00
Output: 1M × $8.00 = $8.00
Total
$10.00

Total cost savings

$20.00

GPT-4.1 saves $20.00 per month vs the other model at this volume.

Model routing savings

Uses this page's verified rates. Claude Opus 4.8 is the premium route (higher combined per-1M cost); GPT-4.1 handles routine traffic.

Premium model

Claude Opus 4.8

$5.00 in · $25.00 out / 1M

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Economical model

GPT-4.1

$2.00 in · $8.00 out / 1M

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All premium

Claude Opus 4.8

$1,500.00

100% of input and output on the premium route

Routed stack

80%GPT-4.1

Claude Opus 4.8

$700.00

Routine slice
$400.00
Premium slice
$300.00

Monthly savings

$800.00

53.3% lower

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

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