Is Claude 3.7 Sonnet or o4 cheaper?

Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.

Which has the larger context window?

Both Claude 3.7 Sonnet and o4 ship a 200K-token context window.

Is Claude 3.7 Sonnet or o4 better for coding?

Both Claude 3.7 Sonnet and o4 are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.

Are either of these models open source?

Neither model ships open weights, both are accessible only via their respective providers' APIs.

When were Claude 3.7 Sonnet and o4 released?

Claude 3.7 Sonnet was released by Anthropic on 2025-02-24. o4 was released by OpenAI on 2025-12-15.

Is Claude 3.7 Sonnet or o4 cheaper?

Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.

Which has the larger context window?

Both Claude 3.7 Sonnet and o4 ship a 200K-token context window.

Is Claude 3.7 Sonnet or o4 better for coding?

Both Claude 3.7 Sonnet and o4 are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.

Are either of these models open source?

Neither model ships open weights, both are accessible only via their respective providers' APIs.

When were Claude 3.7 Sonnet and o4 released?

Claude 3.7 Sonnet was released by Anthropic on 2025-02-24. o4 was released by OpenAI on 2025-12-15.

Claude 3.7 Sonnet vs o4

A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.

UpdatedApr 30, 2026

Claude 3.7 Sonnet specs · o4 specs

Verdict by category

PriceClaude 3.7 Sonnet
Claude 3.7 Sonnet publishes pricing ($15.00 / 1M output tokens) while o4 does not.
Context windowTie
Both ship a 200K-token context window.
BenchmarksTie
No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores.
ModalitiesTie
Both handle text, vision.
OpennessTie
Both are closed-weight, API-only.

On balance Claude 3.7 Sonnet edges ahead, winning 1 of 5 categories against o4's 0. Claude 3.7 Sonnet publishes pricing ($15.00 / 1M output tokens) while o4 does not. Both ship a 200K-token context window.

No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. Both target the same set of modalities (text, vision), so the deciding factors are price, context, and raw quality. Both are closed-weight, API-only.

o4 is the newer of the two, released 10 months after Claude 3.7 Sonnet, which usually means a more recent knowledge cutoff and updated safety post-training. Claude 3.7 Sonnet is usually picked for coding llm and creative writing workloads, while o4 sees more deployments in reasoning and math. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.

Side-by-side specs

Spec	Claude 3.7 Sonnet	o4
Provider	Anthropic	OpenAI
Released	Feb 2025	Dec 2025
Modalities	text, vision	text, vision
Context window	200K tokens	200K tokens
Max output	,	,
Input · 1M	$3.00 / 1M tokens	Pricing not published
Output · 1M	$15.00 / 1M tokens	Pricing not published
Knowledge cutoff	2024-10	,
Open weights	No	No
API available	Yes	Yes

Pricing at scale

What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.

Light usage, 100k in / 50k out per day$31.50 vs ,
Heavy usage, 1M in / 500k out per day$315 vs ,
RAG workload, 5M in / 200k out per day$540 vs ,

Light usage, 100k in / 50k out per day: pricing not directly comparable (one or both models are missing public per-token rates). Heavy usage, 1M in / 500k out per day: pricing not directly comparable (one or both models are missing public per-token rates). RAG workload, 5M in / 200k out per day: pricing not directly comparable (one or both models are missing public per-token rates).

Price calculator

Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.

Input tokens / dayOutput tokens / dayHorizon

Claude 3.7 Sonnet$1.05
o4Pricing unavailable

Benchmarks compared

Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.

Claude 3.7 Sonneto4

HumanEval92.0
SWE-bench Verified62.3

Pick Claude 3.7 Sonnet if

Claude 3.7 Sonnet fits when…

First Claude with extended thinking
Excellent writing and coding quality
Mature, widely-tested

Pick o4 if

o4 fits when…

Exceptional performance on hard math and reasoning benchmarks
Good at multi-step planning and verification
Strong scientific reasoning

Don't want either?

Consider Claude Opus 4.7

Anthropic's mid-2026 flagship, ahead on SWE-bench, agent reliability, and writing quality.

See Claude Opus 4.7 specs Claude 3.7 Sonnet vs Claude Opus 4.7 o4 vs Claude Opus 4.7

Frequently asked

Is Claude 3.7 Sonnet or o4 cheaper?
Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.
Which has the larger context window?
Both Claude 3.7 Sonnet and o4 ship a 200K-token context window.
Is Claude 3.7 Sonnet or o4 better for coding?
Both Claude 3.7 Sonnet and o4 are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.
Are either of these models open source?
Neither model ships open weights, both are accessible only via their respective providers' APIs.
When were Claude 3.7 Sonnet and o4 released?
Claude 3.7 Sonnet was released by Anthropic on 2025-02-24. o4 was released by OpenAI on 2025-12-15.

Friday digest

One short email every Friday, new models, leaks, and quietly-shipped APIs you missed.