Anthropic: Claude Opus 4.7 vs OpenAI: GPT-5.2-Codex
Head-to-head API pricing and cost comparison between Anthropic’s Anthropic: Claude Opus 4.7 and OpenAI’s OpenAI: GPT-5.2-Codex. Prices auto-refresh daily from OpenRouter.
OpenAI: GPT-5.2-Codex is 65% cheaper for input tokens; OpenAI: GPT-5.2-Codex also wins on output tokens.
Side-by-side comparison
| Spec | Anthropic: Claude Opus 4.7 | OpenAI: GPT-5.2-Codex |
|---|---|---|
| Input price (per 1M) | $5.00 | $1.75 |
| Cached input (per 1M) | $0.50 | $0.17 |
| Output price (per 1M) | $25.00 | $14.00 |
| Batch input (per 1M) | $2.50 | $0.88 |
| Batch output (per 1M) | $12.50 | $7.00 |
| Reasoning price (per 1M) | — | — |
| Context window | 1000K | 400K |
| Vision support | Yes | Yes |
| Caching support | Yes | Yes |
| Batch API | Yes | Yes |
| Reasoning capability | No | No |
Monthly cost at volume
Estimated monthly API spend at common production traffic levels (input/output tokens per request shown).
| Volume | Anthropic: Claude Opus 4.7 | OpenAI: GPT-5.2-Codex | Savings |
|---|---|---|---|
1K req/day 500in / 200out tokens | $225.00 | $110.25 | $114.75 OpenAI: GPT-5.2-Codex wins |
10K req/day 1500in / 500out tokens | $6,000 | $2,888 | $3,113 OpenAI: GPT-5.2-Codex wins |
100K req/day 3000in / 800out tokens | $105,000 | $49,350 | $55,650 OpenAI: GPT-5.2-Codex wins |
1M req/day 8000in / 2000out tokens | $2,700,000 | $1,260,000 | $1,440,000 OpenAI: GPT-5.2-Codex wins |
Adjust input/output token counts, request volume, batch & cached pricing.
Related comparisons
Frequently asked questions
Which is cheaper, Anthropic: Claude Opus 4.7 or OpenAI: GPT-5.2-Codex?
For input tokens, OpenAI: GPT-5.2-Codex is roughly 65% cheaper at $1.75/1M vs $5.00/1M. For output tokens, OpenAI: GPT-5.2-Codex wins at $14.00/1M. Real-world cost depends on your input/output ratio — use the calculator to model your actual workload.
What’s the context window difference?
Anthropic: Claude Opus 4.7 has a context window of 1000K tokens. OpenAI: GPT-5.2-Codex offers 400K tokens. Larger context windows are valuable for long documents, RAG pipelines, and multi-turn conversations — but they come with higher input-token bills if you fill them every request.
Should I use Anthropic: Claude Opus 4.7 or OpenAI: GPT-5.2-Codex?
Choose Anthropic: Claude Opus 4.7 if you’re already on the Anthropic stack, want broad ecosystem support, or prefer its feature set. Choose OpenAI: GPT-5.2-Codex for OpenAI’s ecosystem, native vision input, or its cheaper input tokens. Run a small benchmark on your own prompts before committing — price is only one axis.
How are these prices kept current?
Prices are pulled directly from OpenRouter’s public models API once every 24 hours via a Convex cron job, then normalized to per-1M-token figures. Last refresh: Apr 21, 2026.