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Comparison · 2 models · Updated Oct 4, 2026

GPT-5.2 Pro vs Claude Opus 4.6

Claude Opus 4.6 comes out ahead, 61 to 56 on our weighted score, and it is the cheaper option too.

  1. OpenAI

    GPT-5.2 Pro

    Released Dec 11, 2025

    56/100
    • ECI155.4
    • Price$21.00 / $168.00
    • Context400K
    Full specs Remove GPT-5.2 Pro
  2. Our pick

    Anthropic

    Claude Opus 4.6

    Released Feb 5, 2026

    61/100
    • ECI155.3
    • Price$5.00 / $25.00
    • Context1M
    Full specs Remove Claude Opus 4.6

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Claude Opus 4.6 is our pick

Claude Opus 4.6 is the better all-round choice, scoring 61/100 against GPT-5.2 Pro (56). It leads on price, inputs & features and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGPT-5.2 ProCapabilities Index (ECI): GPT-5.2 Pro 155.4 · Claude Opus 4.6 155.3
  • Lowest priceClaude Opus 4.6Claude Opus 4.6 $10.00 · GPT-5.2 Pro $57.75 per 1M tokens (3:1 blend)
  • Longest contextClaude Opus 4.6Claude Opus 4.6 1,000,000 · GPT-5.2 Pro 400,000 tokens
  • Widest inputsClaude Opus 4.6GPT-5.2 Pro: Text, Images · Claude Opus 4.6: Text, Images, PDFs
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGPT-5.2 ProClaude Opus 4.6
CapabilityCapabilities Index (ECI)50%8585
Price25%02
Inputs & features15%6080
Context window10%4460
Overall100%56/10061/100
02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

GPT-5.2 Pro vs Claude Opus 4.6 specifications side by side
SpecificationGPT-5.2 ProOpenAIClaude Opus 4.6Anthropic
Capability
Capabilities Index (ECI)155.4 (best)155.3
ECI rank#25 of 148 (best)#27 of 148
GPQA DiamondGraduate-level science questions—90.5%
FrontierMath Tiers 1–3Research-level mathematics74.0% (best)66.0%
OTIS Mock AIME 2024–2025Competition mathematics—94.4%
SWE-bench VerifiedFixing real GitHub issues—78.7%
SimpleQA VerifiedShort factual questions—47.0%
Price per million tokens
Input$21.00$5.00 (best)
Output$168.00$25.00 (best)
Cached input—$0.50
Blended (3:1)$57.75$10.00 (best)
Long-context rateSame rateSame rate
Price sourceOfficial OpenAI APIOfficial Anthropic API
Limits
Context window400,000 tokens1,000,000 tokens (best)
Max output128,000 tokens128,000 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsNoYes
AudioNoNo
VideoNoNo
ReasoningYesmedium · high · xhighYeslow · medium · high · max
Tool callingYesYes
Structured outputNoYes
Availability
WeightsProprietaryProprietary
API model IDgpt-5.2-proclaude-opus-4-6
API providers833 (best)
ReleasedDec 11, 2025Feb 5, 2026
Knowledge cutoffAug 31, 2025May 31, 2025
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • GPT-5.2 Pro$546.00
  • Claude Opus 4.6$100.00
04 — Questions

Which should you choose?

Which is better: GPT-5.2 Pro or Claude Opus 4.6?

Claude Opus 4.6 is the better all-round choice, scoring 61/100 against GPT-5.2 Pro (56). It leads on price, inputs & features and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, GPT-5.2 Pro or Claude Opus 4.6?

Claude Opus 4.6 is cheaper at $5.00 input / $25.00 output per million tokens (official Anthropic API price). GPT-5.2 Pro costs $21.00 input / $168.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $10.00 per million tokens for Claude Opus 4.6 versus $57.75 for GPT-5.2 Pro (5.8× as much).

Which scores higher on benchmarks?

GPT-5.2 Pro scores higher on the Capabilities Index (ECI): GPT-5.2 Pro 155.4 (#25 of 148) and Claude Opus 4.6 155.3 (#27 of 148). The confidence ranges of the top two overlap (153.0–158.2 vs 153.4–157.3), so treat the gap as small. On individual benchmarks: FrontierMath Tiers 1–3 — GPT-5.2 Pro 74.0%, Claude Opus 4.6 66.0%.

Which is better for coding?

There are no published SWE-bench Verified results for GPT-5.2 Pro yet, so there is no like-for-like coding score. On overall capability, GPT-5.2 Pro leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.

Which has the bigger context window?

Claude Opus 4.6 has the largest context window at 1,000,000 tokens, against 400,000 for GPT-5.2 Pro. Maximum output per response: GPT-5.2 Pro up to 128,000, Claude Opus 4.6 up to 128,000 tokens.

Which can read images, PDFs, audio or video?

GPT-5.2 Pro accepts text and images; Claude Opus 4.6 accepts text, images and PDFs. Claude Opus 4.6 handles the widest range of inputs.

Are any of these open source?

No. GPT-5.2 Pro and Claude Opus 4.6 are proprietary and only available through APIs and apps.

Which is newer?

Claude Opus 4.6 is the newest, released Feb 5, 2026. GPT-5.2 Pro came out Dec 11, 2025. Knowledge cutoff: GPT-5.2 Pro Aug 31, 2025, Claude Opus 4.6 May 31, 2025.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.

05 — Keep comparing

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