API cost decision in 10 seconds

NewGPT Chat Latest vs Claude Opus 4.5

Pick Claude Opus 4.5 for lower cost; pick GPT Chat Latest only if the larger context window matters more.

Pricing data updated: 2026-05-26T11:08:00Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Claude Opus 4.5 for lower cost; pick GPT Chat Latest only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Claude Opus 4.5 is estimated at $17.5 vs $20 for GPT Chat Latest, saving $2.5 (12.5% lower).

Cost-first pickClaude Opus 4.5

Context-first pickGPT Chat Latest

Sample savings$2.512.5%

10x traffic gap$25

GPT Chat Latest has more context, but Claude Opus 4.5 saves $2.5 on the standard workload. At 10x that traffic, the same price gap is about $25. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Claude Opus 4.5 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	GPT Chat Latest	Claude Opus 4.5
Input-heavy / RAG	5M input + 500K output	Claude Opus 4.5	$40	$37.5
Balanced workload	1M input + 1M output	Claude Opus 4.5	$35	$30
Output-heavy chatbot	1M input + 5M output	Claude Opus 4.5	$155	$130

Cheaper input Tie $5 vs $5 / 1M

Both models report the same input price at $5 per 1M tokens.

Cheaper output Claude Opus 4.5 $30 vs $25 / 1M

Claude Opus 4.5 is $5 cheaper per 1M output tokens (16.7% lower; 1.2x difference).

Larger context GPT Chat Latest 400K vs 200K

GPT Chat Latest has 200K more context (2x larger).

Sample workload Claude Opus 4.5 $20 vs $17.5

Claude Opus 4.5 is $2.5 cheaper on the standard workload (12.5% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

GPT Chat Latest Calculating… Estimated API cost

Claude Opus 4.5 Calculating… Estimated API cost

Cheaper for this workload Calculating… Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

both models tie on input price; Claude Opus 4.5 has the lower output price; GPT Chat Latest offers the larger context window. For the 1M input plus 500K output sample, Claude Opus 4.5 is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $20 for GPT Chat Latest and $17.5 for Claude Opus 4.5.

Best Fit

Choose GPT Chat Latest when you care most about larger context window.

Choose Claude Opus 4.5 when you care most about lower output-token price.

Decision Notes

On the standard 1M input plus 500K output workload, Claude Opus 4.5 is estimated at $17.5 vs $20 for GPT Chat Latest, saving $2.5 (12.5% lower).
Claude Opus 4.5 is $2.5 cheaper on the standard workload (12.5% lower).
Both models report the same input price at $5 per 1M tokens.
Claude Opus 4.5 is $5 cheaper per 1M output tokens (16.7% lower; 1.2x difference).
GPT Chat Latest has 200K more context (2x larger).

Head-to-Head Specs

Feature	NewGPT Chat Latest (OpenAI)	Claude Opus 4.5 (Anthropic)
Input Price prompt tokens per 1M	$5	$5
Completion Price per 1M tokens	$30	$25
Sample Workload Cost 1M input + 500K output	$20	$17.5
Context Window	400K	200K
Release Date	2026-05-05	2025-11-24

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Claude Opus 4.5	On the standard 1M input plus 500K output workload, Claude Opus 4.5 is estimated at $17.5 vs $20 for GPT Chat Latest, saving $2.5 (12.5% lower).
High-volume input processing	Tie	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Claude Opus 4.5	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	GPT Chat Latest	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

gpt-oss-120b (free) can replace GPT Chat Latest when lower sample workload cost matters most: $0.
gpt-oss-20b (free) can replace GPT Chat Latest when lower sample workload cost matters most: $0.
gpt-oss-20b can replace GPT Chat Latest when lower sample workload cost matters most: $0.1.
gpt-oss-120b can replace GPT Chat Latest when lower sample workload cost matters most: $0.13.

Larger context near this budget

Llama 4 Scout offers 10M context with $0.23 sample workload cost.
Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
Grok 4.20 offers 2M context with $2.5 sample workload cost.
OpenAI GPT Latest offers 1.05M context with $20 sample workload cost.

Popular competitors

No popular competitor is currently available.

Cheaper alternatives

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Larger context alternatives

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Provider catalogs

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OpenAI catalog

Review all tracked OpenAI models before deciding whether this matchup is the right shortlist.

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Anthropic catalog

Check other Anthropic models with comparable pricing, context, or release timing.

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