Not affiliated with Anthropic. Independent community review.

releasedv4.5 Sonnet / 4.6 Opus

Claude Review (2026)

Safety-first reasoning with extended thinking

Last updated: 2026-02-08

Key Conclusions

  1. 1

    Best-in-class for coding and long-document analysis with 200K context.

  2. 2

    Extended thinking mode enables complex multi-step reasoning at Opus tier.

  3. 3

    Free tier available via claude.ai; API pricing competitive for high-output tasks.

Parameters

Context Window

200K tokens

Max Output

128K tokens

Multimodal

Yes

Languages

95+

Pricing & API

Input Price

$3.00

per 1M tokens

Output Price

$15.00

per 1M tokens

Free TierAvailable

Frequently Asked Questions

What is Claude?

Claude is a family of AI assistants built by Anthropic. It is available via API and consumer products.

How much does Claude API cost?

Claude Sonnet 4.5 costs $3/M input and $15/M output tokens. Opus pricing varies by tier.

Does Claude support images?

Yes. Claude supports image understanding (vision) across Sonnet and Opus models.

Which Claude model should I choose?

Sonnet 4.5 offers the best balance of speed and capability for most tasks. Opus 4.6 is ideal for complex reasoning and research. Haiku 4.5 is best for high-volume, low-latency workloads.

What is Claude extended thinking?

Extended thinking is a feature in Opus-tier models that allows Claude to reason through complex problems step-by-step before responding, improving accuracy on math, logic, and coding tasks.

About Claude

Claude is a family of large language models by Anthropic, designed with constitutional AI principles. Known for strong coding, analysis, and long-context tasks.

How We Evaluate

Our reviews are based on publicly available documentation, API specifications, and benchmark results. We evaluate models across five dimensions:

  • Context capacity — maximum input tokens and practical retrieval accuracy at scale.
  • Output quality — coherence, factual accuracy, and instruction following based on published benchmarks.
  • Pricing transparency — clarity of per-token costs, free-tier limits, and hidden fees.
  • Multimodal breadth — native support for text, image, audio, and video inputs/outputs.
  • Ecosystem maturity — SDK quality, documentation depth, and third-party integrations.

Scores and conclusions are updated when providers announce pricing changes or new model versions. This page was last verified on 2026-02-08.

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